My best friend is my size, but I only know that because we talked about it long ago, and I've never seen it hard. We've worked out at the same gym before and I took a peak once when he wasn't looking to see if I was bigger, but it was exactly the same size as mine and he also has the same huge nuts, too. I was hoping I was bigger because we've always been very competitive.
He's taller than me so mine looks bigger at least, even though we are endowed the same. If I ended up working out with some of my other friends, I probably would take a peak to see who's bigger too because I'm just a competitive asshole like that, but none of my other bros work out at my gym lol