I bought a XS/S size in this dress, I usually get M. This product fit very well. A little tight in my lower arms but comfortable. It was a little short but I'm not concerned because it is meant to be worn with leggings. The material is fairly soft & will keep you warm in fall. It is like a little tougher type of wool. I love this dress in general. You can wear a sports bra or regular bra under it. It's very comfortable & looks really nice on. I would buy this again.