Pygmy marmosets are the smallest marmoset (primate in fact!) and eat tree sap, fruit, and insects. They are usually 5.5 inches to 6.3 inches (excluding the tail) and are 11.4 inches to 14.2 inches (including the tail). Their tail is 5.9 inches to 7.9 inches. Their nicknames are "Pocket Monkey" and "Little Lion". We need to save them! Their habitat is being destroyed by humans. Please start recycling. This will help them. Also, don't buy them from pet stores. Put them out of business (sorry if you have one and don't literally put pet shops out of business). There is a video on YouTube (link will be in links) of marmosets in a pet store, and one is pacing back and forth. That shows a sign of poor enviroment. They deserve to be in the wild. Then there are happy videos like "The Marmoset Song" (link will be in links).