I'm 6ft 1in and 165 pounds. i'm pretty skinny I bought two different sizes that ended up fitting pretty well: tags 40 and 41 (see sizes). was looking for something that looked very snug and was pleasantly surprised: not only do both sizes fit well, but the material/shirt itself seems to be of pretty good quality - especially compared to similar shirts that I've bought from several other brands. The material is very smooth silk and I haven't found any flaws in the stitching.