I'm 6'1" and 165 lbs. I'm quite skinny. I bought two different sizes that ended up fitting pretty well: tags 40 and 41 (see sizes). I have something similar in I was looking for a very tight fit and was pleasantly surprised, not only did these two sizes fit, but the material, or rather the shirt itself, seems to be of pretty good quality - especially compared to similar shirts I've seen from several other brands I bought it in. Silk feels very smooth and I didn't find any imperfections in the stitching.
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