Baby Banz Hats and Flap Hats Baby Banz Hats and Flap Hats are designed to protect your children from the sun's harmful UV rays.  The Baby Banz Hats feature an elastic strap above the brin that allows easy adjustment for years of wear.  100% Cotton, color coordinated with Baby Banz Sunglasses, UPF rating of 50+ for the ultimate sun protection.  Baby Banz Flap hats are made from the same material as the swim suits so your child can be safe from head to toe. Flap Hat Sizing Chart   Small 6-12 months Medium Large Head Circumference 17" 18" 19.5 Baby Banz & Kidz Banz Sun Hat Sizing Chart   Baby 0-2 Kidz 2-5 Head Circumference up to 19" up to 22"