I heard that as you get older, your girth increases, at some point of your life at least. I am 6 1/2" long but 5 1/4" or so around. I'm 19. You think it'll get any thicker? I'm also afraid that my lack of sports/excersize stunted my growth during my teens. When I was a senior in high school, people asked me if I was a freshman or sophomore. Now I'm almost in my junior year of college and people think I'm still in high school. This is kind of why I think I still have some hope in "growth", lol.