IMO the biggest dick confirmed in mainstream porn is Danny D, he claims to be 12 inches but all porn actors lie about their size, he's still the biggest that has been measured. His measurement was also discussed on this thread in serious detail quite a few pages back, it was a solid 8.5 inches on top (I know the porn actress fudged a bit to make it look bigger) but the measurement still stands and it is more reliable than any of the other silly measurements in porn from the side. Here it is again:
Tanya Tate Calls Big Dan's DIY & Gets Danny D Big Cock
Considering Danny has been bigger than every other male actor he has been with most of the dicks in porn are 6-7 inches. We saw Ramon on the previous page measured at close to 8 inches and Preston Parker measured at 6.5 inches. Johnny Sins was measured at 7 inches. Lexington Steele was also measured at 8.5 inches, it was never 9.5" like some claimed and even that was unreliable because it was not on top and the porn actress fudged the start of the tape. Steele is no bigger than 8". Danny D looks bigger than Lexington Steele. I have not seen any dick in porn above 9 inches. All the claims of 10, 11 or 12 are fantasy and do not exist.
Sean Michaels is 8 inches not 11" like the porn industry claims, he was in a scene with Criss Strokes and only an inch bigger than him. Strokes is no bigger than 7". Omar Williams was in a scene with Danny D and Danny was bigger than him, Omar is 7.5" not 11 like he claims either. Ian Scott is probably close to a 7". Peter North is nowhere near 8.5 inches, he's 6.5" or so at the most the same size as Manuel Ferrara.
Evan Stone is close to 7 inches (see previous page for pics), he was in a scene with Wesley Pipes who claims to be 10 inches but Pipes was an inch bigger than Stone which would put him at 8". Pipes is a similar size to Lexington Steele. They are not 11 inches like the porn fantasy claims. As discussed on the previous pages there are many porn actors in the 6-7 range. James Deen is not 9 inches like he claims he's 6.5". Erik Everhard is 6 inches.
I don't know how big Clover is, he could be 7.5" but no bigger. Kieran Lee who claims to be 10 inches is just over 7 inches. He was in a scene with Manuel Ferrara and not much bigger than him. Manuel is 6.5". I would put Jay Snake and Evan Rochelle at 7 inches.
Unfortunately I have no measurement for Dick Rambone, but he is also one of the biggest I have seen. He probably was an 8" but he couldn't get fully hard.