Biggest one I have seen in person.... A friend I did threesomes with him and his girlfriend. Easily 8" long, I worked in furniture mills and construction so am a pretty good judge of length. Plus have g to measure certain parts for furniture blahdy blahdy blahdy blah.... Also damned thick with a taper to the head. It was fucking impressive. It's also where I learned size really don't matter all that much. I could get her to cum more often, and harder. Something to be said about grinding, and knowing juuuust when to pound.... I wasn't small as in nearly 6" and tapering to decent at the base. This was pre Peyronie's tho.
After the third threesome he wanted to suck me tho. I'm not bi, don't have a problem with it it just doesn't interest me. We stayed friends for a while. So no more threesomes, but I learned another important lesson about women. When they cheat, it's not necessarily to find a bigger dick like some think when they're young. It's for a better connection and a better lay sometimes. She was the second to do that so she kinda confirmed that for me..... She wasn't the last either.....