I also bought the RJ version in medium, which fits my 5'2, 150lbs frame perfectly, but a small would've sufficed because the down jacket gives you a lot of room for layering. The only problem I have with this down jacket is that it's too perfect, and I, unfortunately, live in CA where it is NEVER cold enough to wear this jacket out. However, this jacket is so perfect for cold, mountainy-snowy areas up north. Pricey, but worth a buy. I love this jacket so much!