Apes are a diverse group, and their lengths vary greatly.
To give you a good answer, I need to know:
* What species of ape are you interested in? For example, gorillas, chimpanzees, orangutans, and gibbons are all apes.
* Are you asking about their height, arm span, or body length? Each of these measurements will be different.
Once you provide me with more details, I can give you a more accurate answer.