While we're getting all gay and vain in here, I'll add to it.
I realize without a six pack I may be considered unfit by many here on CP. I am short, 5'7" and currently at 178lbs. I haven't worn a size small shirt since being a sophomore in high school, even while always being short. I wear a Large or quite often now an XL t-shirt to fit my shoulders, otherwise it's skin tight up top and I don't want to always look like a douche. I realize my shirt size makes me obese, but I'm cool with it.
Also note how you can create better looking lines with lighting from directly over-head vs ambient light in these shots.
http://imgur.com/I8sjLxC
http://imgur.com/7ghaaUs
http://imgur.com/8SujaC8
/No Homo