Size

[Dabird]

What size penis is average for a 13 year old mine is 5.5 is that average

[Lost in the Echo]

There really is no average for teens in puberty, since everyone is at a different stage of development, but the average for a full grown male is 5-6 inches. So, you're doing pretty good if you're already within that range. :)

[Trace]

You're well within adult range, so...