List of largest extant lizards

Largest extant lizards

By families

Agamas (Agamidae)

• The largest representatives in this group are species in the genus Hydrosaurus, which often exceed 1 metre in length.
• *The largest species – Makassar sailfin lizard and Sulawesi black sailfin lizard grow to a length of 1.2 and 1.13 m respectively.
• *Weber's sailfin lizard, Philippine sailfin lizard and Amboina sailfin lizard have a length of 1 m.
• The Australian water dragon and Chinese water dragon can also exceed this length.
• The frilled lizard has length up to 85 cm and mass up to 870 g, probably even 900 g
• Uromastyx aegyptia is one of heaviest representatives among agamas, with length up to 76 cm and mass 2 kg.
• A central bearded dragon and eastern bearded dragon have a length of, and are the largest in their genus.

American legless lizards (Anniellidae)

• The largest American legless lizard is the [Anniella pulchra|Californian legless lizards|legless lizard] attaining long.

Glass lizards (Anguidae)

• Many representatives of this family are legless lizards. Among these the largest species, and also the largest legless lizard in the world, is the sheltopusik, reaching a maximum length of more 135 cm and a mass in.
• The eastern glass lizard and slender glass lizard may reach lengths of up to and respectively.
• However, this family also has lizards with legs, among which the largest is the Texas alligator lizard growing to from 45.7 cm till 64 cm in different sources.

Chameleons (Chamaeleonidae)

• Of all chameleons, the largest is the Parson's chameleon, reaching a length of 68 cm. But the longest species is the Malagasy giant chameleon. It has a length of up to 68.5 cm.
• Other large chameleons are the veiled chameleon and Meller's chameleon, with lengths of up to 61 cm Exceptionally large specimens of the latter have reputedly reached over 76 cm and mass 600 g, although this is unlikely.

Spinytail lizards (Cordylidae)

• Many species in this family are small to medium-sized lizards that range in length from 6 to 30 cm. There are large species in the genus Smaug, the largest of which is a giant girdled lizard, with snout-vent length up to 20.5 cm and total length up to roughly 40 cm.

Casquehead lizards (Corytophanidae)

• Casquehead lizards are quite large lizards. In particular, the genus Basiliscus typically measures 70–75 cm. But the largest species in this group is the plumed basilisk, frequently growing to 91 cm.
• Another large species in this group is the eastern casquehead iguana reaching up to 70 cm including its long, thin tail.

Collared lizards (Crotaphytidae)

• In this family it is not known exactly which species is the largest, but according to current data the largest is the reticulated collared lizard with length up to 41 cm and mass 78.77 g.

Anoles (Dactyloidae)

• Large species in this group are usually crown giant anolis ecomorphs The species generally considered the largest is the knight anole, which can reach up to 51 cm in total length, 19 cm in snout-vent length and weigh 137 g.
• However, in the equester species complex there are also species reaching the same length and even larger. These include A. baracoae, A. luteogularis, A. noblei and A. smallwoodi.

Geckos (Gekkota)

• Species of geckos belong to different groups. For example, many species of geckos are in family Gekkonidae, but there are very large species in the family Diplodactylidae. For example, to them belongs the largest gecko species New Caledonian giant gecko, which can be 36–43.18 cm long and mass 212–279 g
• Other representatives of the same genus as the aforementioned gecko can also reach huge sizes. These include gargoyle gecko, greater rough-snouted giant gecko and lesser rough-snouted giant gecko. As well as former species in this genus: crested gecko, Sarasins' giant gecko and Bavay's giant gecko.
• An extant member of the genus Hoplodactylus, Duvaucel's gecko, in which be present a largest gecko ever lived can also reach large sizes. It can reach total length 30 cm with a snout-vent length up to 16 cm, and weigh up to 120 grams.
• There are also large species in the family Gekkonidae. These include tokay gecko, Smith's green-eyed gecko and Andaman giant gecko, which can reach and even exceed 30 cm.
• Another genus with large geckos is Uroplatus. The largest representative in this genus is the giant leaf-tail gecko, which can reach a snout–vent length of 20 cm and a total length of 32.2 cm. Another species that grows almost as large is the common flat-tail gecko, which can exceed 30 cm and more.
• The genus Phelsuma in subfamily Uroplatinae also has large species. Standing's day gecko is one of the largest day geckos, reaching a length of about and Round Island day gecko, Madagascar giant day gecko and P. madagascariensis can reach even more impressive lengths of 30 cm or more.
• Outside of the families Diplodactylidae and Gekkonidae, there are large geckoes among the Eublepharidae. The African fat-tailed gecko reaches a length of up to 23 cm, and a mass of. The leopard gecko reaches even large sizes – up to 28 cm long with a mass of 60–80 g.
• The largest species of family Phyllodactylidae, the giant wall gecko, reaches in length and in SVL.

Plated lizards (Gerrhosauridae)

• The largest species in this family is the giant plated lizard, with a total length of up to 69 cm or even 75 cm, with a snout-vent length of 28 cm. Another large plated lizard is the Sudan plated lizard, with a length of about 51–60 cm.

Beaded lizards and Gila monster (Helodermatidae)

• This family includes large and stocky lizards, including the infamous Gila monster, which reaches a total length up to 60 cm with a snout-vent length of 36 cm and a body mass from to depending on the source. But despite the stocky and massive body of this lizard, it is not the largest representative of the family. Greatly exceeding it in size are the Mexican beaded lizard and Rio Fuerte beaded lizard, with a total length of up to 91 cm, a SVL of up to 47 cm and a mass from to depending on the source.

Iguanas (Iguanidae)

• Iguanas are very large lizards, some of which can reach lengths of up to 2 m and mass more than. They are the largest lizards after some large species of monitor lizards, and the largest lizards in the New World. Iguanas vary considerably in size and form, but even the smallest lizards in this family are still quite large. For example, the desert iguana can reach a length of up to 61 cm. The largest species of the genus Sauromalus is the San Esteban chuckwalla, up to 76 cm long and in weight, while the second-largest is the Angel Island chuckwalla, up to 64 cm long.
• Many sources describe the green iguana as the largest iguanid, often reaching lengths up to 1.5 metres and masses of, and with a maximum length of 2 m and a mass of and in some cases even. However, the heaviest species in this family is the blue iguana, with a total length of up to 1.5 m, a SVL of 51–76 cm and a mass of up to It is the eighth-heaviest and largest extant lizard.
• Other large species in this family include the Galapagos land iguana, with a length of about 1.5 m and a mass of up to. It is the second-heaviest iguanid after the blue iguana and the ninth-heaviest and largest lizard in the world. Another large species from the same genus is the Santa Fe land iguana, reaching a SVL of and a mass of. The Galapagos pink land iguana have snout-vent length and the mass of.
• The marine iguana is the tenth-largest extant lizard in the world, and the largest reptile on Galapagos Islands after the Galapagos land iguana, not including turtles reaching a maximum total length of 1.4 m, a SVL of from 12 till 56 cm and a mass of from depending on islands.
• Aforementioned genus Cyclura includes other very large iguanas, such as Anegada rock iguana reaching a snout-vent length of and a mass. A second largest species in this genus and second longest iguanid overall, and also one of the largest lizards in the Caribbean, the Cuban iguana reaching a length in with a SVL in.
• The rhinoceros iguana has a length in, with a SVL and a mass more. Previously considered a subspecies of the aforementioned rhinoceros iguana, the Mona ground iguana exceeds a total length of 1.22 m, SVL of, mass of and is the largest native terrestrial lizard in Puerto-Rico.
• At least two subspecies of the Northern Bahamian rock iguana can be over in length.
• A member of the genus Iguana, lesser Antillean iguana can reach SVL, and mass.
• The black iguana and western spiny-tailed iguana are the largest species in the genus Ctenosaura, reaching a length in. The longest is Mexican spiny-tailed iguana with a length of.

True lizards (Lacertidae)

• This family includes 300 diverse species. Among the largest is Gran Canaria giant lizard, reaching a length of, with a SVL of and a mass of almost. A subspecies in the same genus – El Hierro giant lizard, perhaps also is one of the largest lacertids, and able reach a length of. A Tenerife lizard have a total length in and a SVL of. Another large lizard in this genus are La Gomera giant lizard, reaching a length of almost and a SVL in
• Estimated to reach snout-vent length of and a mass of, La Palma giant lizard is perhaps the largest living lacertid, outsizing even Gran Canaria giant lizard. However, on the other hand, there is very little data to confirm this, and therefore the aforementioned Gran Canaria giant lizard is usually considered the largest representative of its family.
• The longest member of this family is ocellated lizard, having a length of, with a SVL and a mass. A representative of the same genus, the Moroccan eyed lizard can have a length of, and is one of the longest members of this family.
• The European green lizard, Iberian emerald lizard and western green lizard can exceed a length and more, and with a SVL at least. The largest species in this group is Balkan green lizard, reaching a length of, and a SVL of.

Earless monitor lizards (Lanthanotidae)

• The only living species in this family – earless monitor lizard typically has a snout-vent length of about, and a total length of about. The longest recorded in the wild had length in. A specimen collected in the 1960s had a total length of, and near the time of its death an individual kept at the Bronx Zoo from 1968 to 1976 had a total length of and weighed, but it was highly obese.

Curly-tailed lizards (Leiocephalidae)

• The largest curly tailed lizard is Leiocephalus carinatus. Adults may attain a snout to vent length of, or a total length, including the tail, of. The dorsal scales are keeled and pointed. Leicoephalus carinatus resembles lizards of the genus Sceloporus, but with the tail usually curled upward, especially when the lizard is in a horizontal position on rocks or on the ground.

Leiosaurids (Leiosauridae)

• Enyalius catenatus can have a body mass of up to.

Liolaemids (Liolaemidae)

• Members of the genus Liolaemus are vary considerably in size and weight. The largest species are L. chlorostictus, L. dorbignyi, L. duellmani, L. forsteri, L. foxi, L. huayra, L. inti, L. jamesi, L. melanogaster, L. nigriceps, L. orientalis, L. patriciaiturrae, L. puritamensis, L. robertoi, L. scrocchii and L. stolzmanni. The species L. fabiani, L. filiorum, L. pachecoi, L. pleopholis, L. polystictus, L. robustus, L. thomasi, L. vallecurensis, L. vulcanus, and L. williamsi, L. austromendocinus, L. elongatus, L. gununakuna, L. petrophilus, and L. thermarum also may reach large sizes

Madagascan iguanas (Opluridae)

• The biggest species of Madagascan iguana is Madagascar spotted spiny-tailed iguana, it can reach a length of.

Legless lizards (Pygopodidae)

• The largest legless lizard in this family is the common scaly-foot with a length of, a SVL of with a weight of. It is also the largest legless lizard in Australia and biggest in the world overall, if not counting some members of the family Anguidae.
• Another large member is Burton's legless lizard with a maximum length of 60 cm, according to some information even and a body length of.

Skinks (Scincidae)

• In this family of about 1500 species, many skinks have a snout-vent length of. The largest member of this family, the Solomon Islands skink, can grow to a length of, a SVL of 35 cm and a mass of. The heaviest is the common blue-tongued skink, reaching a length of, a SVL of 36 cm and a mass of.
• The genus Tiliqua also has large species of skinks. One of them is the subspecies Indonesian blue-tongued skink – Merauke blue-tongued skink growing a length of, thus not only being the longest species in the genus Tiliqua, but also the second by length in family Scincidae after Solomon Islands skink. Large sizes may also be reached by blotched blue-tongued lizard with a length of, according to some information even, a SVL of and a mass of, Centralian blue-tongued skink exceeding in length of with a SVL of, western blue-tongued lizard with a length of and a SVL of, probably, shingleback lizard with a total length of, a SVL of and a mass of and an Irian Jaya blue tongue skink with total length of.
• Previously in the genus Tiliqua is the pink-tongued skink, with a length of and a SVL of.
• The land mullet is one of the largest skinks and can reach a SVL of with a total length of. A representative of the same genus – the major skink also grows to large sizes – a total length of with a SVL of
• The King's skink is one of the longest skinks and can exceed a length of with a SVL of and weighing. Other large skinks are Cunningham's spiny-tailed skink and yakka skink, both of which reach a length of.
• A representative of the genus Eumeces is Schneider's skink has a length of with a SVL in. Previously in the aforementioned genus – Kishinoue's giant skink is the largest species in its genus and may grows a length of with a SVL of. Other large members in the genus Plestiodon are a broad-headed skink and a Great Plains skink with a maximum length of 32.4 cm and and a SVL and respectively.
• The genus Chalcides includes many legless or almost legless skinks. The largest among these are the Italian three-toed skink and the western three-toed skink which have a length of and respectively. In the genus Acontias also are limbless skinks many of which are quite small lizards, but the largest among these is giant legless skink at approximately reaching 40 cm in length.
• The fire skink is the largest member in its genus and also one of the largest African skinks, growing to a length of and a SVL of
• Telfair's skink, the largest living skink in Mauritius, attains a size over in SVL and may grows in length with a maximum length of and a mass in. Its extinct relative is Mauritian giant skink, which in twice excelled to length of its contemporary and was the biggest known skink of all time.
• The terror skink is an endangered skink and may reach in length and in SVL thus not only being one of the largest extant skinks, but the second biggest reptile on its island after monitor lizards, and so is an apex predator in its territory.

Tegus and Teiids (Teiidae)

• Many teiids are quite small lizards, although some members such as tegus are among the biggest lizards in the world after monitor lizards and iguanas. The largest species are Argentine black and white tegu and red tegu, which attain more than 1.2 m in length and in mass. Argentine black and white tegu is usually considered the largest species in its family with a length of 1.5 m and a mass of. Although, however, the red tegu, being more massive and bulky, can weigh more – the length is about, and the weight is.
• Both species of genus Dracaena, the northern caiman lizard and the Paraguay caiman lizard, can have a length of 1.2 m and a mass in.
• The largest member of the genus Tupinambis is the gold tegu with a maximum SVL in. Other large teiids in this group are the cryptic golden tegu, the Cusco tegu and the Maracaibo Basin tegu .

Monitor lizards ([Varanidae])

• The Komodo dragon is the largest living lizard in the world, with an average weight of and for males and females respectively. The largest males from Komodo, may reach more 80 kg. The largest specimen of Komodo dragon, a large male from Loh Liang National Park with length of, a SVL of and a mass in 81.5 kg. As stated above, females are generally much smaller than males. The largest female weighed about. The heaviest specimen in the wild weighed about. The study noted that weights greater than were possible but only after the animal had consumed a large meal. The largest accurately measured individual according to Gerard Wood for Guinness World Records was a specimen put on display at the Saint Louis Zoological Park, Missouri in 1937. This individual reportedly measured 3.13 m and weighed, although a large portion of this was likely undigested food. Because Komodo dragons can eat up to 60% their own body weight, this weight record is considered invalid. Excluding this specimen, the Komodo dragon's maximum size is surpassed by large snakes like the green anaconda and the reticulated python, but considering that these exceptionally large specimens are reported at a much lower frequency, it is still arguable that the Komodo dragon is the largest extant squamate on Earth.

• The Asian water monitor is the second-biggest lizard in the world after the Komodo dragon, and also the longest lizard in the world. The largest specimens come from Malaysia, particularly around the Cameron Highlands, where specimens over 2.5 m in total length are sometimes encountered. Jasmi records that wild specimens can weigh up to. The largest member this species from Sri-Lanka and attained in length of about. Thailand is also home to some huge water monitors, but elsewhere the water monitor grows to smaller sizes. The biggest found in Java are around in total length, 2 m in Sri Lanka, in Sumatra and mainland India and less than 1.5 m on the island of Flores. Unverified weights of 50, 70 and even 90 kg have been reported in escaped pets in Florida but such enormous weights remain unverified. The 80 males slaughtered for the skin trade in Sumatra had an average weight of only, with a snout-vent length of and a total length of ; while 42 females had an average weight of, with a nose-to-cloaca length of and a total length of. Among these monitor lizards, some specimens weighed from. Another study in Sumatra by the same authors also estimates the weight of some specimens at while the average adult weight in the population is estimated to be about.

• The crocodile monitor sometimes is regarded as the longest lizard in the world. The longest verified individual, a specimen at Museum Koenig, is long. Some have been claimed to be much larger, including three individuals that reportedly were, and long, but these sizes are unverified. The tail of the crocodile monitor is proportionally very long, typically 2–2.7 times the snout-to-vent length. A weight of up to usually is reported, but in this slender and long-tailed arboreal species healthy adults typically weigh. Some sources suggest a mass up to, although this is highly questionable.

• The Nile monitor is the largest lizard native to Africa alive today and fourth or fifth-largest lizard in the world after the Komodo dragon, Asian water monitor, crocodile monitor and competes with perentie. In most cases, males of Nile monitors reach a total length of 150–170 cm and weigh in the region of, while females are about long and weigh about. Exceptionally large wild specimens of the Nile monitors can probably reach about 2.5 meters in length and weigh about, making them one of the largest lizards in the world. In 1929, a photograph of a Nile monitor from South Africa was published, which was said to have reached a total length of and weighed almost. The same author also reports that he shot another monitor lizard approximately 2.5 m long. The largest animal this species reliably known to date reached a total length of with a length from the muzzle to cloaca length and estimated at According to Faust, the largest representative of this species measured 2.43 m. A specimen with a length of was recorded from Orange Province in South Africa. Near Lake Chad, the maximum recorded size for a male is and for a female is. The largest female Nile monitor for which there is reliable data reached. Thus, it seems likely that in South Africa some specimens can reach lengths of 200 cm or more, but they are very rare.

• The perentie is by average length and weight the largest extant lizard native to Australia and fifth or fourth-biggest lizard in the world after Komodo dragon, Asian water monitor, crocodile monitor and competes with the Nile monitor. It is endemic to arid central Australia, found west of the Great Dividing Range. The largest individual recorded by measuring 2438 mm in total length. However, based on the vagueness of this account, some authors claim Stokes' reported measurement of 2438 mm is exaggerated and a more likely maximum length may instead be . There have been larger individuals supposedly measuring more than 2.5 m in total length and in mass reported but such claims remain unverified. The maximum size of the perentie is probably not as great as many authors claim King & Green provide a useful discussion of size in this species. The longest found on Barrow Island by King et al. had a total length of with a SVL in and the heaviest weighed. Butler record s a specimen of with a total length of from the same island. Stokes records that two specimens collected on Barrow Island in 1840 had total lengths of. Strimple suggested that one of these animals was the type specimen used by Gray, which has a total length of only. Many perenties do not grow to such an enormous size, and the specimens on Barrow Island may grow larger than the main population. The limited data available suggests that females reach a smaller maximum size than males, rarely exceeding TL. Bredl records males of TL, and a female of TL. It appears that perenties approaching 2 m in length are the exception rather than the rule, and that in general few specimens grow larger than 1.5 m. If specimens of 2.4 m or more have ever existed, none seem to have survived to the present.

• The black-throated monitor is a subspecies of rock monitor and, perhaps, the heaviest lizard in Africa. Although, little information is available on the size of this species of monitor lizards. According to many information black-throated monitor attains 2.1 m in length and 27 kg in mass. However, unknown whether this mass is reached in captivity or in the wild. By another – black-throated monitor has a mass of. However, specimens for this species rock monitor was recorded.

• The lace monitor is the second-largest lizard in Australia after the perentie and seven-largest lizard in the world overall. The largest instances may reach a length of 2 m with a SVL of and a mass of. In 1986 Gerard Krefft suggested that lace monitors grow as large as. None of this size exist now and specimens of 2 m TL are exceptional. A lizard from Mallacoota, Victoria measured SVL, TL and weighed. Another from Healesville was long and weighed almost. It was found to have eaten four foxcubs, three young rabbits and three large blue-tongued skinks, and all this was taken into account when weighing, is unknown. And, accordingly, the most commonly used maximum size for this species is a length of and a weight of for the previously mentioned specimen. In contrast, a large male in the spring measured 1.5 m TL and weighed. Males grow larger than females and probably have larger home ranges.

Subgenus Empagusia">Varanus (Empagusia)">Empagusia

• The largest representative of the subgenus Empagusia is Bengal monitor with a length in and a SVL of, a mass of, and in captivity even more –. However, typical measurements are much less – 1.5 m in a length and in a mass. Even so, by some reports it grows much larger.
• Another large species of this group are the clouded monitor with a length of 1.5 m and a SVL of, the roughneck monitor, which has a total length of, a SVL of with a mass of, the Dumeril's monitor and, and the yellow monitor with a maximum length of, a SVL of and a mass of.

Subgenus Euprepiosaurus">Varanus (Euprepiosaurus)">Euprepiosaurus

• The largest members of this subgenus are the mangrove monitor and its close relatives with a total length of 1.5 m, the Rainer Günther's monitor with a maximum total length of, probably even 1.5 m, the tricolor monitor having the maximum length of, the blue-tailed monitor exceeding long, the Rennell Island monitor reaching in length and the New Ireland monitor growing the length in.
• Other large lizards in this group include the quince monitor, the peach-throated monitor, the Mussau Island blue-tailed monitor and the sago monitor .

Subgenus Hapturosaurus">Varanus (Hapturosaurus)">Hapturosaurus

• The largest tree monitor is the blue tree monitor with a maximum total length about and a SVL of. Other large tree monitors are the emerald tree monitor, which can attain in total length, in snout-vent length, the black tree monitor with a maximum size of SVL, total length and the Bogert's monitor measuring a length of with a SVL of.

Subgenus Odatria">Varanus (Odatria)">Odatria

• Whilst this subgenus has many species, they are the smallest monitor lizards. It includes Dampier Peninsula monitor – the smallest monitor with a length of, a SVL of and a mass of.
• The largest species in this subgenus is the black-palmed rock monitor, reaching the maximum size of and for SVL and total length respectively. Another big member of this group is Mitchell's water monitor, which may grow to a length in with a SVL of.

Subgenus Papusaurus">Varanus (Papusaurus)">Papusaurus

• The only species Papusaurus is a crocodile monitor .

Subgenus Philippinosaurus">Varanus (Philippinosaurus)">Philippinosaurus

• These large frugivorous monitor lizards may be long or more with a mass of >. The Northern Sierra Madre forest monitor with a maximum size instead be in length and in mass, the Gray's monitor, the biggest individual of which was just long and a mass of and the Panay monitor with the largest specimen which had a length of and a mass in, are among of the biggest lizards in the world. They measure, and SVL respectively.

Subgenus Polydaedalus">Varanus (Polydaedalus)">Polydaedalus

• The largest species Polydaedalus are the nile monitor and the black-throated monitor .
• Another large member of African monitors is a rock monitor, and to be more precise, its type species – white-throated monitor with a maximum length of and and an average size of in length and for females and for males in mass by some sources. But, however, according to others even mass in is a very rarely.
• Large sizes are also reached by also other members of Polydaedalus. This include savannah monitor and Yemen monitor with a length of and respectively However, Bosc's monitor in captivity can be extremely obese and exceed weight.
• The ornate monitor can attains the length of, however, the ornate monitor is not currently considered a separate species, but is merely a polymorphism of two different species.

Subgenus Psammosaurus">Varanus (Psammosaurus)">Psammosaurus

• The subgenus Psammosaurus includes large and medium-sized monitor lizards, growing to a length not less than. The largest member of this little group and also the largest lizard in Central Asia is the desert monitor, specifically Caspian monitor with a max.total length of, a SVL of and a mass of and a SVL of with a mass in for longest and heaviest males and females respectively. The Nesterov's desert monitor is also quite large, attaining in length and in SVL.

Subgenus Solomonosaurus">Varanus spinulosus">Solomonosaurus

• The Solomon Island spiny monitor is a species of subgenus Solomonosaurus, with a maximum reliable length and mass in captivity of and respectively.

Subgenus Soterosaurus">Varanus (Soterosaurus)">Soterosaurus

• The largest Soterosaurus is an Asian water monitor .
• Second largest after Asian water monitor are the marbled water monitor and the Palawan water monitor with a total length of almost . By the data marbled water monitor can weigh about, although since V. palawanensis was previously considered a subspecies of V. marmoratus, which species this weight referred to is unknown.
• Even medium-sized monitors in this subgenus are quite large. For example, the yellow-headed water monitor and the large-scaled water monitor with maximum length of and, a SVL of and and and in max. mass respectively. Also they include the Togian water monitor, the Samar water monitor, the Rasmussen's water monitor and the Enteng's monitor lizard .

Subgenus [Varanus]

• The largest members of this group are the Komodo dragon, perentie and lace monitor .
• After them is the yellow-spotted monitor or Argus monitor, which also is the third biggest lizard in Australia, with a maximum length of and mass of, although in captivity huge individuals can weigh about and even more.
• A close relative of the aforementioned species is Gould's monitor, also attains large sizes — exclusively large specimens measuring length of with a mass of. The Rosenberg's monitor grows long, probably with a SVL of.
• Though not as long as some other species of large varanids, the Spencer's monitor can have a high weight for its length due to its massive and bulky body, and has a length of and mass from till depending on sources.
• The smallest representative of this genus is the Mertens' water monitor with a length of . Though not as bulky as some other species of monitor lizards, in captivity it can weigh up to.

Night lizards (Xantusidae)

• The largest night lizard is the yellow-spotted tropical night lizard which attains a snout-to-vent length of with a tail 1/3 times exceeding the body length.

Knob-scaled lizards ([Xenosauridae])

• The largest xenosaurid is a knob-scaled lizard with a snout-vent length of and a total length of.