100% Ringspun Cotton. Fabric: Midweight. Design: Hogwarts Crest, Text. Neckline: Crew Neck, Lycra Ribbed. Sleeve-Type: Short-Sleeved. Single Needle Collar Stitching, Supersoft. 100% Officially Licensed. 153gsm. 12-13 Years: 18.5 in. 5-6 Years: 15 in. 7-8 Years: 16 in. 9-11 Years: 17 in. Ref: UTBI1325