text: how big should an eleven year olds dick be? my brother wants to know and is to afraid to ask himself.?   there is no rhyme or reason to age and size kiddo. there are men that stand 6ft 6 and have a 3 incher.  take what you have and stop comparing and worrying.  if you use it in the right way it will be fine and you will be happy and possibly your mate will be also.