Brookesia micra

A young Brookesia micra on a match head

Brookesia micra is, as of 19 February  2012 (2012 -02-19), the smallest known species of chameleon in the world. It is small enough to stand on the head of a match.[1][2][3][4][5][6] It can grow up to 29 millimetres (1.1 in) in length.

References