You would think that in the enlightened and statistic crazy 21st century, there would be some sort of definition on this subject out there.
These guys who claim hugeness (Falcon, Lex Steel, Mandingo, Holmes, Ron Jeremy etc) have never (to my knowledge) allowed themselves to be independantly measured and reliably verified.
Some bird who does porn (Jameson etc) giving an estimate is not quite the same thing.
Pamela Anderson swore that Tommy Lee was in the region of 10" but their home made video suggested otherwise. Angelina Jolie said the same about Billy Bob Thornton, but she also married Johnny Lee Miller (what's with all the prissy, 3 name, dudes - LOL) and attended her wedding in black leather pants and a white shirt, upon which she had written the groom's name in herown blood. How fucked up is that? So hardly a reliable source.
It's about time someone like Heffner or one of the big porn studios got their finger out and offered a reward for the guy with the biggest, functioning, cock to step up to the plate and get measured. But I guess they won't as all they seem interested in is fantasy - not fact.