The Prevost squirrel's head to rump length is 9 to 10 inches with a tail length of 8 to 9 inches, and a weight of 13 to 18 ounces. This is a very colorful animal whose name means beautiful squirrel. The top of the head, the back, the tail, and the sides are a glossy black, the underparts are reddish, and where the other colors approach each other on each side, there is a pure white line. The fur is fairly full but not particularly soft, and although the tail appears fairly full, it is flat as the underhairs are short. They have only four functional toes with fully developed claws on each foot. They do not have canine teeth, but have a pair of chisel-shaped incisors in each jaw.