Vaginas don't have a length, some women are what they like to call "small" down there, really they're nervous and inexpereined so all the muscles are tight tight tight, and the cervix isnt the end of the vagina, it's a little thing that tickles me underneath the head of my dick when I'm hitting it from behind, bit it isn't the end, you can go further. Vaginas are like rubber balloons, they can be stretched in length and girth, how do you think they pass babies without the mother dying