This is a subfamily of stout-bodied snakes, all of which are competent burrowers. The largest, E. johnii, rarely exceeds 120 cm (47 in) in total length (including tail). Most grow to around 60 cm (24 in) in totallength. They have small eyes and hard, small scales to protect their skin from the grit of sand. A great deal of sexual dimorphism exists, with females generally becoming much larger than males