Popular check shirt. Men's size S. Would be about a women's size M? I bought it because I wanted a stylish check flannel shirt. It's a more subdued yellow than in the photos, closer to a yamabuki (Japanese marigold) color. I removed the tag, but I only tried it on. It's in near-new condition, but it's still a used item, so please refrain from purchasing if you are sensitive to this.