Ferrets In Sweaters

As described by the Oakland Zoo,
Ferrets have a long and slender body covered with brown, black, white, or mixed fur ... Average length is 20 inches including a 5-inch tail. They weigh 1.5 to 4 pounds, with males substantially larger than females ... Gestation is 42 days, litters are usually 3 to 7 young, but sometimes more. Females may have two to three litters annually. Young are weaned after 3 to 6 weeks and become independent at 3 months. Sexual maturity may come at 6 months. Average life span is 8 years.
—Conservation and Education: Oakland Zoo
The fur of the ferret is usually brownish, although many variations of colors and patterns exist. Some common colors that may be seen in ferrets include: albino (white fur and pink eyes); sable; chocolate; silver and cinnamon with patterns such as mitts (white feet); panda (white head); badger (white blaze), and Siamese (dark legs and tail).