I'm 6'4" 230 lbs. 49 inch chest and 36 inch waist and muscular. I ordered the xxl and the fit is perfect. Most shirts that are big enough through the chest and shoulders have a lot of extra material around the waist and torso, and look sloppy. This shirt fits exactly like is shown on the model. If you're any bigger than me the shirt will be too small and xxl is the largest size available. If you have dad bod, this is not the shirt for you. The fit is definitely slim as advertised.