This is my second FG guard, and I'm genuinely considering only getting their guards from here on out. I'm 5'9 and slimmer and went with the small. Fits perfectly! FG is always true to size, unlike most other big name rashguard manufacturers. I own rashguards from Kingz, Maeda, Ronin, Fuji, FG, Scramble, and Tatami. FG, Scramble, and Tatami are the only brands, in my experience, that are true to size. All of the others are just a bit too snug.
True to size! Fast shipping