 Beetles of the tribe Nanosellini are all less than 1 mm long; the smallest confirmed specimen is of "Scydosella musawasensis" at 325 μm long; a few other nanosellines are reportedly smaller, in historical literature, but none of these records have been confirmed using accurate modern tools.These are among the tiniest non-parasitic insects.The western pygmy blue ("Brephidium exilis") is one of the smallest butterflies in the world, with a wingspan of about 1 centimetre.