SK Hat shop Unisex Foldable Bucket Visor Neck Flap Cover Safari Sun Protection Cap Hat Fabrication: 100% Polyester Size: One size for men, ladies and teens Head Measurement: 56cm, 22", Size 7 ~ 58cm, 23-1/4", Size 7-1/4 (elastic back) Brim: 3-1/2" Height: 4-1/2" Back flap: Length 9-3/4"