I really depends on the girl. Some can't handle over 7", as it literally hurts them (cervix punching). My last gf could've taken more than my 7.5" length, but said my 5.5" girth was her limit. The gal I'm with now seems to LOVE when I bottom out on her, and though she could probably handle more girth, her pussy contracts like a vise when she cums rofl