board shoulders - how much wide are this guy's shoulders (clavicles)

[bobsmith03]

Ain't nobody got 20 inches of clavicle (biacromial width). Isn't the average like 16.5 inch? That's a lot of bone. I think you guys underestimate how much fat/muscle contribute to shoulders. I literally added an inch to my shoulders by gaining 18lbs (and I was underweight). I'm 150lbs now and have 19 inch bideltoid. If I got to 170lbs they'd be like 20 inch at least at 5'10

my biacromial width (measured with callipers not tape) is 18.89 inches. each clavicle is 8 inches.