Here are some examples:
* The smallest monkey: The pygmy marmoset is only about 5 inches tall and weighs less than 5 ounces!
* The largest monkey: The mandrill can grow up to 3 feet tall and weigh over 70 pounds!
To answer your question more specifically, you need to tell me which type of monkey you're interested in.
For example, if you want to know the size of a capuchin monkey, I can provide you with more detailed information. 😊