ok, i'll bite. I'm right at 7 (see a measurement pic in the gallery) and pretty thick at 5.5". Honestly, I have trouble thinking of myself as very big, but I think that's largely due to the fact that here on lpsg, I'm really not - I'm average or small. And from looking at porn, where the guys are my size or above. But I'll reiterate that in the real world, 7 inches is really big. So much so that women comment on it a lot. Most comment on the girth, though, which is surprising. But yeah, I've had to be really gentle with maybe 3 girls out of 13. And all but two have said, unsolicited, something about the size. (comments ranged from "you're huge" to "you're so big" - these girls weren't virgins either)
I do wish I was bigger, but what guy doesn't? Tried out a Magnum recently too, and was glad it fit me. There's a little bagging in the head, but not much. When I wore regulars, my cock never moved at all inside the condom and it hurt to put on and pull off. With magnums, there's zero slippage around teh shaft, and my head moves a bit inside the condom, which feels ten times better.
So I think 7 inches, with a solid girth, is definitely big. i've had too much anecdotal experience to suggest otherwise. Feel free to comment on my pics too - trying to get more comments in there.