Flap happy"s UPF 50 plus floppy hat is now available in an array of bright colors and prints with a detachable flower. The hats not only look great, but offer excellent sun protection. Our floppy hat has a large brim and chin strap to shield your child’s face, ears and neck from the harmful rays of the sun. Pairs great with flap happy"s clothing and swimwear. Flap happy hat size chart: small fits 14-inch-17-inch head circumference (about 0-6 months). Medium fits 17-inch-18.5-inch head circumference (about 6-12 months). Large fits 18.5-inch-20-inch head circumference (about 12-24 months). X-large fits 20-inch-22-inch head circumference (about 2 years and up).