I'm 5'1 and 105 lbs. I got the jacket in XS and it fit great, except the arms were a bit long. It's really comfortable and you can really move around in it. Good for layering and very soft. I got it in St Tropez and the color is slightly brighter than in the pic. really nice color. However, it only looks really good when it is all buttoned up. It's not the warmest jacket but perfect for southern CA resorts like Big Bear where it's not that cold.