Brutal trying to hide loose tape
So, they'd be ~16" without the loose measuring, and 15" if he dropped the fat. Not exactly a world-beater.
On the topic of loose tapes and crappy arms, i present the worst 20 inch biceps in history (not Blaha, but equally delusional):
He's some douchebag who brags about his arms on a non-lifting forum i visit. Plenty of guys who literally never lift have biceps that look like that. No peak, no split, no veins, no tris, flabby, with loose tape. Yet he acts like his arms rival Arnie's.
Sound familiar? Always take E-stats with a grain of salt.