100% cotton. Size S = for 8/10 year olds. Slightly larger than Japanese sizes. Length 55 cm, measured from the shoulder (neck side). Fading, and a hole on the back right neck (discovered during inspection. I didn't notice it when wearing it). I will sell it at a low price to those who understand. Used item, stored at home, so please refrain from purchasing if you are sensitive to such things. Simple packaging.