How much girth does it take to plasure a woman?

Its not about girth or length. The clittoris (spelled that wrong i am sure) is located toward the top of her vagina just inside. That's what you are after, rub againt that and you should be very sucessful, but remember its very sensitive, to don't be to harsh (unless she asks you to =)... Girth and length apply more to anal sex, some girl want more, some want less, but the point is there is no standard.. and the saying that its not the size but rather how you use it holds true. I mean i think a girl would probably want a guy with a regular or smaller size penis that is capable of pleasuring her over a guy with a huge one that cannot.