Don't worry, I'm 7 inches on a good day and all the girls I have been with think its big. If a girl needs something over 6 or 7 inches she probably has been around so its no biggie if you don't get in her pants. And like baby face said, anything bigger ends up jabbing places. Also in bed I think attitude is more improtant than size, even if your not hung like a horse fuck her like you are and she will probably enjoy it.