This is a long-sleeved shirt made of 100% cotton. I took the tag off, but I only tried it on in the store and then put it away. It's a shirt with a very nice fabric that has a slight sheen. I believe it cost around 30,000 yen. Size: Ⅰ Although it's size Ⅰ, I think it would be a good fit for someone who wears a size M. The armpit to armpit measurement is about 52cm, and the shoulder width is about 41.8cm. Please feel free to contact me if you have any questions.