I'm usually in between medium and large and ordered a Medium for this coat and I am very pleased with it! it is comfortable, roomy and very warm! and I live in MA where it can get very cold! A great buy!
Great jacket- Haven't worn it yet offically. Sizing is great-offers layering options. The only thing I would change on this coat would be a nice felt lining- like the gloves, so one doesn't get into a "cold" coat!