I wore it once and washed it. There's no tag, but I usually wear a size M. The sleeves are 3/4 length. Actual size: Shoulder width: Approximately 38 cm Body width: Approximately 44 cm Length: Approximately 54 cm I don't know the material because there's no material tag. I think the collar is cotton. I will use recycled materials for packaging. Also, please note that it may take up to 2 days to ship.