I know you're new, but if you look back through some of the older threads; I'm sure that you will find the same thing I'm telling you now. Every woman is different in size and capacity. One person can stretch more than another, and their size or height is not a factor. Pretty much, the size of a woman's vagina is the same as a man's penis....neither has any specific parameters related to other physical characterisitics. If you are with a girl and want to find what it takes to reach "rock bottom" with her, either use your own tool, or find something long enough that can reach that point.