Not sure size is the real measurement, after a certain length, guys bottom out on me and just start hitting my cervix. Anything over 7 1/2 inches bottoms out on me, but it's how rough the guy is that makes it "too big". I've had sex with guys who were over 1o inches and that sex was great because they were not too rough. Also had sex with guys who were 7 or 8 inches and they were very rough because they pounded too deep and didn't care. So for me, there is no too big, just too rough. I like taking a big dick all the way but from a guy who knows how to fuck and just how much to hurt me!