Size: S/48cm = head circumference 46-48CM; Advise age 12-18 months M/50cm = head circumference 48-50CM; Advise age 18-36 months L/52cm = head circumference 50-52CM; Advise age 3-4 years Notice: The measurement may have 1-3cm (0.39-1.18inch) inaccurate errors. There might be slight colour deviation due to different displays. Details: Weight: 400g Color: blue,red Material:100% cotton Department: unisex baby boys and girls Package Include: 1 hat + 1 Scarf + 1 pair of Mittens