This is a cotton knit from GU. I think you can wear it comfortably in the spring if you wear a short-sleeved shirt underneath. Also, I think it will be useful in the fall if you change the inner layer to a thicker one. Tag size: S Actual size: ・Length: Approximately 58cm ・Width: Approximately 55cm ・Sleeve length: Approximately 48cm ・Shoulder width: Approximately 54cm *Please note that there may be slight errors as these are flat measurements taken by a amateur. There are no stains, but there is some fading and wear. Material: Cotton Neck: Crew neck/U-neck