Of course there's always the old saying "It's not how big it is, it's how well you use it that counts". There is of course a good deal of truth to this statement, this is always assuming that you GET the opportunity to use the damn thing in the first place.
I know there are some ladies who simply will not entertain the notion of a man with a small manhood. This in turn brings up the questions how small is too small ?, and how big is too big ?.