Well, the question that almost every teen boy wants to know is: how do I measure up? And they are usually referring to their penis size first! Well, the first thing to know is that until you are all about age 20, you will not necessarily have achieved full growth of your penis, and that it will grow at different rates and times for all males. So, someone who may be "larger" than you at 14 may be "smaller" than you by 18. This variation in growth is enough to give any teen a case of paranoia!
So, bearing that in mind, here is one set of findings from FULLY GROWN MALES, not from teens, so remember that the sample group had all achieved full growth potential: you may not have yet!