Size: One Size - Stretch Inner Sweatband Fits up to 58.7 cm - 23 1/8 - 7 3/8 Material: 100% Polyester Cool Mesh Ivy Flat Hat for Men and Women. Variety Colors Great for Outdoor and Going Out Casual Wear Hat Measurement: Crown: 3 in, Front to Back: 14.25 in, Ear to Ear: 13.5 in, Brim/Bill Length: 2 in Great cool mesh ivy flat hat for the hot season Summer or Spring. The material is breathable all over for ultimate air flow made from 100% polyester. The hat is one sized with stretch inner sweatband fitting up to 57.8 cm - 22 3/8 in - 7 1.4.