Moor macaques are large-bodied primates with very short tails. They are not a particularly colourful species of primate; most of their pelage ranges from a light brown to a dark brown, although the hair framing the face is a lighter shade of yellowish-grey. They have dark faces, hands and ears. Their ischial callosities, thickened layers of tissue over their buttocks, are pale pink. At certain stages of their menstrual cycle, females will exhibit large sexual swellings.