i wouldn't worry your penis will continue to grow until the age of 25 and it is a good size for your age but size is not all that matters so just worry about using it proporley

i am 7.4 inches @ 17. i would say your on the ball. though like newtolove said size doesn't matter its how u use it..

though size does help sometimes in certain positions when making a girl orgasm during sex.

i'm 21 years old and have 9 inch penis and it will not stop growing till i'm 25 i hope it stops

are you sure it is nine inchs ? sure you didn't confuse inchs with cms ?well I feel I am a good size perhaps just over the average but then again the average varies according to who you ask so I don't really worry about it I know I am ok and hope I will use it proporley