Attn Females - Genuine Deepest Penetration

Girls, what's the deepest genuinely measured penetration you've had ? Most guys lie about size and most girls probably feel the bigger guys are bigger than they really are. I'm guessing after 8" there are very few that go deeper. So what's the biggest that you've ever measured that you got balls deep inside you ?
And what was it like ? Better, worse than an average cock ? Different orgasm ? Any problems afterwards ? And if there is a gynae out there where does it actually go???? Most vaginas are 3-4" long but can double in length. So what about the girls that reckon they've taken 10" plus ???