I still haven't met a WG as tight as my very first civvie, who was 17 at the time. I could get three fingers inside her (complete with the old "wiggle spread") but no more. She was naturally very wet.
Recently here in Naples I fucked a fantastic redhead hooker whose pussy was most generous. I ended up with all four fingers and the thumb of one hand inside her, and most of the hand as well. I fist fucked her so hard I could hear her pussy swelling as her torso heaved. She had the most perfect round tight asshole which sadly was off limits, but her super loose cunt made almost any sexual position a breeze.