GU Long T-shirt Blouse, Thin, Smooth Material, Relaxed Fit Size S, but it has a relaxed fit, so it seems like it can be worn layered or by someone who wears size M. Made of Tencel material, so it's thin and smooth. Hides the buttocks. You can wear long sleeves underneath and it can be worn in early spring. If you layer it, you can wear it all season. I will sell it to someone who understands that it is a used item. Color: Blue