Atomweight
Atomweight is a weight class in combat sports.
Boxing
In women's boxing and junior amateur boxing pinweight is, or has been, a weight class for boxers weighing in under .In September 2010 the women's class in amateur boxing was partly merged into an extended 45–48 kg light flyweight division, with women weighing less than 45 kg excluded from competition. Pinweight is still defined for junior contests.
Women's professional champions
Current Champions| Sanctioning Body | Reign Began | Champion | Record | Defenses |
| WBA | November 21, 2025 | Isabel Rivero | 12–3–1 | 0 |
| WBC | October 25, 2025 | Camila Zamorano | 13–0 | 1 |
| IBF | ||||
| WBO |
Current ''The Ring'' world rankings
As of December 22, 2025.Keys:
| Rank | Name | Record | Title |
| C | |||
| 1 | Sumire Yamanaka | 9–1 | |
| 2 | Camila Zamorano | 13–0 | WBC |
| 3 | Eri Matsuda | 8–2–1 | |
| 4 | Esneidy Rodriguez Olmos | 11–0–1 | |
| 5 | Nao Ugawa | 6–0 |