Standard/1-Size: chest 46" or height 6"0", weight 200 lbs; S: chest size 36 to 38"; M: chest size 40 to 42"; L: chest size 42 to 44"; XL: chest size 46 to 48"; 2X: chest size 52 to 54"; 3X: chest size 56 to 58"; Plus: chest size 50 to 52" or height 6"2", weight 300 lbs