Fancy That Hat - White with Black Polka Dots (Large) 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.