"Finger Monkeys" are actually Pygmy Marmosets. They get about 5-6 inches long and weigh about 4-5 ounces full grown.
How Big Do Finger Monkeys Get When They Are Fully Grown?
Monkeys can grow up to 6ft. 7
Monkeys can grow up to 2 meters but it all depends on the type of monkey
20ft.