This family contains the smallest of all beetles,[1] with a length when fully grown of 0.3–4.0 millimetres (0.01–0.16 in).[2] The weight is approximately 0.4 milligrams.[3] They are colloquially called featherwing beetles, because the hindwings are narrow and feathery.[2] The eggs are very large in comparison to the adult female (maybe half the length) so only one egg at a time can be developed and laid.[1] Parthenogenesis is exhibited by several species.[1]