Jessica London gifted me with this very warm and spacious coat from their holiday collection, and I love my Wool-Blend Pea Coat! It runs true to size. The reviews on Jessicalondon.com all said it was very spacious, so you didn’t need to size up. As someone with big arms, I can tell you that this is absolutely true. Please don’t go a size up. I bought the coat in my regular size and still had room for my sweatshirt!