Polo Ralph Lauren Commuter Coat, Lightweight and Sophisticated. Truthfully, I have no idea what a '1XB' is. It fit me well at the time and I went with it. I included the measurements below. I'm 6'1 and at the time, I was about 250. Purchased new the summer before last and worn, without embellishment, probably three times. I did get a discount on the jacket because of a light mark on the left chest. I never bothered to try and remove it because it was kind of light and unnoticeable. I am pricing the jacket specifically for that. Otherwise, there are no marks on the collar or the cuffs or the Hem. It's essentially a new coat. Beige/Khaki Trench Lined Overcoat Jacket MSRP $448  Men's Size 1XB Armpit to Armpit 27” Armpit to hem 23.5” Back length neckline to bottom 35.5”