One Hat for Multiple Purposes: The hat scarf is versatile, you can transform them according your need, for example, hat, scarf, neck warmer, hat scarf, balaclava, etc. The integrated design of the hat and scarf can cover and keep your child’s head, face,ears and neck warm and comfortable at the same time. Size of the Winter Hat Scarf Set: The hat has great elasticity, it is unisex for baby/toddler/kids boys and girls, and there are two size available: small size for 6-36 months baby, hat circumference is 14-17inches; medium size for 4-12 year old kids, hat circumference is 17-21inches. Please choose the appropriate product size according to your baby's and kid's age and head circumstance.