Ordered 17, 36/37. My standard shirt size is 16-16.5, 36/37, but 17 fits me better for a slim fit. I'm 6ft 1in and 255lbs. I usually find IZOD to be comfortable for bigger guys (like me). --==Upgrade== -- Downgraded from 5 stars to 1 star (I didn't choose 1 start because I like the colors of the shirt, I just hate ironing it (new word) So after 1 wash i will never buy that stretch izod shirt again THEY ARE IMPOSSIBLE TO IRON I even had to do some research on the material mix to see if that wasβ¦