When boys start puberty, the age is 12, though it can start later. Things you should know you are starting puberty as a boy is voice cracks, also your voice gets deeper, pimples (as everyone does when puberty hits.) You head, arms, and feet are usually the things that grow first, then the rest of the body catches up. Also, unlike woman, who stop growing at 14, men stop growing at 22. I hope I helped, even if I am a girl!