Baby Sugar Gliders are called “Joeys” (just like Kangaroos) and they are about the size of a grain of rice when they are born. They spend the first few weeks of their lives in their mother's pouch (again, like a Kangaroo) - and fully-grown they are about 5-7 inches in length (not including their tail) and weigh about 6 ounces.
They LOVE to ride around in shirt and pant pockets, which is where they got the name “pocket pets”.