wesd The unique physical appearance of this Monkey is very different. They have a gray body and as they get older they develop white tuffs that extend from the sides of the face. They have a tail that is very long and is gray and white striped. They can be up to 1 pound in size for the males and even less for the females. The males and females often look very similar to each other. This isn’t common for most species of Monkeys.