The head and tail length of the Wallaroo ranges from 43 to 78 inches, and the weight from 14 to 103 pounds. Coloration is dark gray to reddish above, and paler below. The fur is shaggy, coarse, and varies somewhat among the subspecies. The rhinarium (area of naked skin around the nostrils) is black. The stance is distinctive: shoulders thrown back, elbows tucked into the sides and wrists raised. There is marked sexual dimorphism: mature males attain twice the weight of mature females and are usually darker in color.