Hi, this is Amy. Most of my girlfriends talk about size as though it's important, but I can say that I never really noticed a difference. Most guys I've dated, and some were pretty tall guys, seemed about the same size. It was never something I ever even really thought about. I would say 6 inches or a little less. As far as Im concerned, bigger would just mean more painful. Mike is no bigger than average, but even that can hurt without enough lubrication. I don't orgasm through intercourse, even though I enjoy it very much. So to me its more about the guy knowing how to bring me to orgasm rather than his physical size.