[1] Mature Arctosa perita of both sexes have a body length of 6.5–9 mm (0.26–0.35 in), although males tend to be smaller.

Dark streaks radiate from the fovea, and white hairs form broken lateral bands towards posterior half of the carapace.

It usually has a greyish cardiac mark, which is flanked on either side by a pair of pinkish-white patches with smaller, white spots behind.

The legs are robust, pale, with clear dark annulations and, along with the palps, are covered in setae and spines.

The posterior eyes have small patches of white hairs to the sides and the rear, and the AME are larger than the ALE.