If it's the anomie an xl would be huge on you. I'm 5'11 and 175 and an xl was very big on me. The length was good it was more just how wide it was it felt like a tent and was heavy. So maybe try one on if you can and see what you think of the fit.
how baggy do you want your coat to fit? i'm 6'1", 175lbs and wear a large, and it fits appropriately. For reference: https://scontent-b-iad.xx.fbcdn.net/hphotos-frc1/t31.0-8/778911_640013411224_1364203151_o.jpg