OK, I’m 5 foot eight at 160 pounds. I bought the extra small and the small that is my general sizes. The extra small is too short. The small is almost perfect, but it is cotton. It will shrink both of them very wide quality of the shirt excellent are really nice premium shirt. But I am going to return them and get a medium and if I wash it and it shrinks, it will be great. It is definitely going to be a smaller shirt that’s cropped. So ladies size down unless you want really big men size up unless you want a belly shirt or it to be really tight if it’s long enough. Great shirt, but they shouldn’t say regular length it isn’t. It’s cropped everyone it is cropped. I would buy the shirt in different colors if they made it black brown olive yeah the logo on the back is pretty neat by the way actually all of the graphics on this shirt are subtle and really nice. Just buy it but remember my sizing information.