I still say the gadge of huge is when the head surpasses the belly button area hard ...
uz
Thats still a big difference of several inches between a guy that is 5'5" and another that is say, 6'4".
Also, some guys (like my self) have long toursos and short legs compared to other guys my height.
A cock head past the navel is fun to own and formidible to look at, but not a good indication of real size.