hey me2dammit, bro I got 20" arms cold, and I see lou ferigno everyday at the gym, bro arnold had over 20" arms bro, if lous arms were over 20" in pumping iron and arnolds arms were bigger with more shape than lous at 275 then his arms had to be atleast 21", and again I agree with the illusion part but I think in 73-75 arnold did have over 20" guns, I could care less but I think no matter what, you cant take anything away from arnold, the other day a buddy in the gym came up to me and said bro how many inches are your guns? I said, theyre 20", he said, ohh the same size as arnolds, and I said, no arnold had 22", but its all good no matter what, arnold had better arms than almost any bodybuilder of all time given time periods and technology!