 Fully grown adult males are usually 5.6 to 6.9 cm (2.2–2.7 in), while females are a little bigger between the ranges of 5.6 and 7.9 cm (2.2–3.1 in) and they weigh between 35 and 55 g. Their colouring is described by Cope (1886) as "brown, marked on the back with a median yellowish line, and two to three rows of brown spots of medium size on each side of it.