A unique lizard adapted to an underground existence, the sand skink measures 10 to 13 centimeters (4 to 5 inches) in length and has a gray to tan color. Its forelegs are tiny and bear only one toe; its hindlegs are small and have two toes. The tail comprises about half of the animal's total length. The sand skink has a wedge-shaped head, a partially countersunk lower jaw, body grooves into which the forelegs can be folded, and small eyes which have transparent windows in the lower lids.