Guys,
a 20 inch arm is enormous! 21 is incredible, 22 is out of this world, 23 aint gonna happen unless you are Lou Ferrigno he's the only pro bber I believe to have ever had 22+ in arms. 24 does not exist. Im talking pro bbers, contest/off season, whatever. no 23 inch arm, never mind 24!
all this shit started in the 60's when everyone all of a sudden had 19/20 inch arms, then in the book pumping iron Arnold had 22's, Franco had 19's

...
then FLEX tells us Wheeler has 21's, Dillet 23's Mattarazzo fucking 24's.. cmon. 24 inches is the size of a thigh. And everyone, has 20 inch plus arms.
I'll find the pics Ive got of Ray Mentzer and Eddie Robinson's life size shots of their 20 inch arms, very, very offseason. Eddies arms are the size of his head there.
Ask Steve Namat what his arms measure in contest shape, ask Bob what his (huge) arms were at their biggest, and his comments on this topic.