Well, as a girl I'll speak for my guy. He's 7" long and about 4 1/2" around. He has this ridge that sticks out a lot at the bottom of the head that is great for hitting my g-spot as it goes back and forth over it. I'm kind of small, so he completey fills me-when he first enters me, by the time the head is all the way in, I can't help but close my eyes and go "unghh"-the friction that the ridge causes against the vaginal walls causes kind of a "sweet ache" right where it contacts the vaginal wall. He's long enough to hit the cervix, and if he gently but firmly massages it with the head of his dick it will set off an orgasm with spasms that start deep in my belly. That kind of come is really intense.