I'm 5ft 5" and 180lbs and I usually wear a large and ordered a size large. It fits tighter - not tight, but tighter than I wanted. I would say that because of CrossFit I have bigger shoulders and arms than most women and they are quite tight in those areas. the rest is less than I would like but it's still flattering. It's not fat at all lol - don't buy for warmth. but it looks classy and goes well with a black sweater. I still wear it 1-2 times a week. I don't usually have chest tightness, but I would say that if you have larger breasts, it gets tight too. I'm 36C and again it fits my chest snugly.
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