Pimelea cinerea is a slender shrub that typically grows to a height of, the stems densely hairy but with few branches. The leaves are arranged in opposite pairs, elliptic to narrowly elliptic or oblong, long and wide on a short petiole. The flowers are borne in few-flowered heads surrounded by 2, 4 or 6 bract-like leaves, and are bisexual, white and hairy on a hairy pedicel, the floral tube long and the sepals about long. Flowering occurs from November to January.