I'm 5'5 - 180 lbs and I usually wear a size L and ordered a size L. It fits snugger - not snug, but snugger than I'd like. 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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