I’ve gotten many messages about this jacket. It’s lightweight- some of you have asked if it is lightweight enough for a southern holiday, and I’d say yes. It’s one of the lightest weight tweed fabrics I have in my closet. It runs ROOMY. This is a size small and I often size up to a 6 in blazers because I have broad shoulders. Otherwise, I’m usually a 4/small in tops. This is roomy enough to layer a thick sweater underneath. So size down if you don’t need to layer. I think an XS would have worked on me too and I would never typically buy an XS jacket. I think the fit is closer to a medium or 6.