This shit got me curious, so I measured mine at 17", I'm 6-2, 200
you gotta a lot of balls making that bet destriero
He's 180, tops. Assuming he's reasonably lean the statement is cartoonish. I used to do a shitload of shrugs at peak gear at 260lbs and never got above 18-19". He's clearly not bigger than 15" in that pic.
I am a little taller than you and a lot bigger. His statement is clownish and he'll never produce proof.
Measure your head circumference below your nose.