Yeah, I thought 6inches was average size. Did you want to know because you thought it was "to big" or you worried it wasn't "big enough". It's never good to compare penis sizes, its like girls comparing boob sizes, everyone varies, and it will only make you self conscious if you do that. Just be happy with what you have, right?
Average male I believe is 5.5 inches, but it can vary in size from the guy who already posted who said he is 3 inches to myself who is 7 inches and some are just freaks with like 10 inches.
Not to worry, you will grow into it.
That's alot larger than mine, im just under 3 inches at my biggest and i'm 24...but i have also been on steroids for medicinal reasons, so your fine