Flap happy floppy hat is designed to provide excellent sun protection from damaging sun rays. The floppy hat has a large 360-degree brim to shade your little one's face, ears, and neck from the harsh rays of the sun, and it features two ties to prevent hat loss on windy days. This hat looks terrific when paired with other flap happy swimwear and playwear, and it is perfect for any outdoor or water activity. It is available in an array of colors and fun prints, making it an easy gift if you would prefer the floppy hat in 100 percent organic cotton, please visit the flap happy organic floppy hat. Flap happy hat size chart, measured head circumference in inches: x-small fits 14-15.5 0-3m, small fits 15-17 about 3-6 months. Medium fits 17-18.5 about 6-12 months. Large fits 18.5-20 about 12-24 months. X-large fits 20-22 about 2 years and up.