Flap Happy's crusher hat with ties is designed to provide excellent sun protection from damaging sun rays. The hat has a brim to shade the face, ears and neck from the harsh rays of the sun. To top it off, we've added a much requested chin strap. The crusher hat looks terrific when paired with other Flap Happy swimwear andor playwear. Perfect for any outdoor activity and is practical for every day wear. You and your child will love this hat for the fun prints and comfort Flap Happy hat size chart small fits 14 inch-17 inch head circumference for about 0-6 months. Medium fits 17 inch-18.5 inch head circumference for about 6-12 months. Large fits 18.5 inch-20 inch head circumference for about 12-24 months. Xlarge fits 20 inch-22 inch head circumference for about 2 years and up.