For what it's worth...
A friend of mine (credible guy, someone I would believe) met Dorian Yates at a seminar in Belfast just after the '93 Olympia. I don't have any verification of this story, but I'll tell it for what it's worth...
Yates was at his best ever, no tears... no injuries... and 295 lbs with a hint of abs.
They got to talking after the seminar... Yates mentioned that having overdieted in '92 he had been a little less drastic in '93 which resulted in him coming in some 15 lbs heavier. But that he had been contest ready nearly a month out from his second Mr O win and that next year ('94, not realising he'd be injured) he hoped to diet less and come in around 270 ripped.
My friend mentioned FLEX Wheeler's claim of a 23.5'' arm at 220 lbs in contest form... Yates laughed and replied that at 295 lbs off-season his arms only barely broke the 20'' mark (20.125'') when he finished a bicep workout. (Apparently Yates was very fastidious about measurements and records)
To add credence to that story, the Guinness Book of Records people measured Greg Valentino's synthol filled growths live on tv... the result: 24.5'' and 24'' does tha tally with Arnold having 23'' or 22'' arms?
If your arm actually measured more than 22'' you'd be able to touch your bicep peak with the index finger of that same arm.
The Luke