Baby Infant Toddler Girls Cute UV Protection Dot Sun Hat with Flower and Velcro Chin Strap by Fancy That Hat Cotton Machine Washable. See inside label for washing instructions. Sun hats help protect little faces from the sun's harmful rays. Hat Velcro's under chin to help keep the hat on. Size Chart: 3-12 months 18.1 inches, 12-24 months 19.3 inches, 2T-4T 21.1 inches.