Blue-tongued lizards are the largest members of the skink family. Skink lizards have overlapping scales that are usually smooth and contain small plates of bone.
The Eastern Blue-tongue is silvery-grey with broad dark brown or blackish bands across the back and tail. Individuals on the coast usually have a black stripe between the eye and the ear which may extend along the side of the neck. The Blotched Blue-tongue is dark chocolate brown to black with large pink, cream or yellow blotches on the back, and a tail banded in the same colours.
The Eastern Blue-tongue can grow to almost 600 mm in total length, of which about 360 mm is head and body.