The smallest reptile in the world is the Jaragua Sphaero, or Dwarf Gecko, at 16 millimeters from nose to tail tip, this lizard can fit on a US quarter. It was found in the Dominican Republic in 2001; one of only two places in the world that this lizard has been seen; the other being Beata Island, a small island belonging to Haiti.

In competition for the title of the smallest lizard in the world is Sphaerodactylus ariasae: the Monito Gecko, another Dwarf Gecko, found in the British Virgin Islands in 1965 also averages about 16 millimeters long. There if very little known about either one of these lizards. Only 18 of them were collected to study. The maximum length the Monito Gecko can reach is 36 millimeters. The species is listed as Endangered by the IUCN because so few specimens could be found.