Men's 6 Panel Linen Duckbill Ivy Hat With Summer Low Cut Sock Made 100% Linen One size. It's made with a flex-fit sweatband that stretches to fit. Anyone can wear this hat comfortably. Inside of hat circumference appox 23 ~ 23 1/2", Measurement is made around the inside of hat, 6 panels, fully lined inside.Bill measures 2 inches long, Pre curved and attached on front crown. Lightweight, breathable and comfortable hat of supreme quality.