Recently I was looking at an old picture of me taken Christmas at my grandmother's house, I was 13 or 14, and I blushed at the bulge I had, I didn't realize it back then, but it looked like I had stuffed several pairs of socks in my pants. I was skinny at that age and was already reaching 7" if I had to guess, I know I had already reached 8" before 17. Of course, now I'm 8.5" x 6.75", but on my 6'2", 300 lb frame it doesn't,it looks average in length, but still thick. I never measured my girth until a few years back, but I do know I'm much thicker as an adult than I was as a teen. I really don't know how I compared as and infant or pre-teen. I do recall being about 15 and using the public urinal and taking my first glance and being able to tell I was longer the the adult taking a leak at the next urinal- I had always been told the angle you see another man's goods makes it look larger than the angle you see your own does, so I felt somewhat confident I was "well-endowed" from that point on.