“I'm 6'5" and 220lb. I usually look for the model in the picture, as we are exactly the same and everything else he models for American Tall size large seems to fit me perfect. He's not super slim and doesn't have extra long arms. That said, this shirt is quite tight and short for a tall large. I'd say anyone reading this should buy the size up if you are use to American tall sizing... espcially if you want to wear this over a shirt.”