Every girl is different, so no one can really say.
the vagina is able to adjust almost to anything (all within reason)if your are sexually aroused then you can put almost anything in there (all within reason)=)
I heard that it can only technically fit 4 but I'm big and I get at least 6 7 in
Well, I don't know, but I heard or read before that the thing expands during intercourse so ...try looking it up. =) link
How many inches could a normal girl fit in her vagina?
Like if she was having sex. How far could she go[inches]?