Made of sturdy 100% cotton material, it absorbs sweat well in the summer. The dimensions are (length 56cm, shoulder width 9.5cm, sleeve length 15cm, body width → 44cm when laid flat, front and back). Because it's sturdy, it doesn't stretch particularly well, so although the Uniqlo size is L, it might be better to consider it a size M. (There is a faint stain on the left front of the garment, which is barely noticeable, please check the photos. It has been washed.)