This shirt is a really nice, soft, stretchy fabric, but be prepared for it to be skin tight. Looks fine on the model, but very unflattering on me. Showed every lump and bump. Not the look I am going for! I am 5'6" and about 185lb and ordered a large. Large in other tops I ordered here were fine, so it is definitely the fit of the top. If you want it a bit looser, I suggest going up a size or 2.