This coat I ordered in S un XS. I wear otherwise mostly south, sometimes XS. In size S, he was way too big (even with fleece jacket underneath) and looked like a sack. Size XS sat prima, makes a great figure and looks great. On the arms he is relatively narrow, and at the shoulders - perfect So for those narrow shoulders and slender arms. The wool fabric is a bit scratchy, what you feel at the neckline if you have no intervening scarf. And also the hanger from the wool fabric, the neck scratched a little. Whether he warms well, I can not quite judge because of the mild temperatures. I have the impression that he still could be a bit warmer (I'm cold very quickly). Because he looks so beautiful I have but to keep him still.
Meanwhile, I've made the cold test: Unfortunately I have despite fleece jacket frozen underneath. But this could also be due to me and not only on the jacket because I'm freezing very quickly. Rather not so suited So for frostbite.