even ignoring the veins you're starting to show striations in the chest, stomach is lean, V is pronounced, biceps are pronounced, abs are defined. if you are as high as 12, I wouldn't think you could possibly be any higher.
that would put you at around 185lbs / 8% ish? 12 seems high to me. at 10 and lower I was starting to show the striations in the obliques and finally lower ab veins, I can't quite see your obliques in the pic cause you're arm is doing that awesome flex. I'm thinking half those veins are actually tattooed on