We had a guy in our gym years ago, that had 19 inch arms. Now that doesn't sound all that crazy, but to see the man in the flesh, would just put you over the edge. He had the most impressive pipes in our gym. There were guys in our gym with 20 inch plus arms.....but not with the impressiveness of the man with 19 inch arms.
I think big is a misleading term......case in point.....how many bouncers are considered big? All of them, right? They are all 5'10-6'0 and at least 220-230. Some are even bigger.....6'4 300 plus pounds......but you take a world class bodybuilder like Flex or Shawn and you put them up against the bouncer......Flex and Shawn win every time..... Shape can give the illusion of mind boggeling size......just my 2 cents.