Mustela putorius

The head and body length of the domestic ferret varies from 8 inches to 18 inches with a tail length from 3 inches to 5.5 inches and a weight of about 60 ounces. Males are larger than females, but females have longer tails than males. General coloration is dark brown to black, with the underfur being pale yellow, and clearly seen through the guard hairs. The area between the eye and the ear is silvery white.