I'm standing at 5'6 to 5'7 and weight 140 Ib. I thought buying a US S (Asian Tag: L) since I have a pretty slender body, but I bought US M (Asian tag: XL) and it fit very well. I recommended to size up 2 times for the Asian size if you're very buff and have round body. Overall, it should fit the way it's expected.
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