Buckle closure?MATERIAL : Cotton and Denim Made. Lightweight / Durable / Smooth,last for A Long Time.?ONE SIZE (22.3-23.7 In) : Easy To Adjust Strap Customize,It Is Available As One-size-fits-all For Heads Measuring 21.6~23.6 In In Diameter. Head Height Is 3.5 In (9 Cm).?FEATURES: Single-layer fabric, no inner lining, natural comfort and ventilation, light and dry, can absorb sweat and drain moisture, available in all seasons, the vent design not sultry, quality denim cap ensures the greatest sports experience.?ADJUSTABLE METAL BUCKLE: Greatly convenient to adjust the size of the baseball cap to fit your head.The unique and adjustable design also makes the caps suitable for both men&women.?MAKE AN AWESOME GIFT: These Baseball Caps Make An Excellent Present Idea For Your Friends And Loved Ones. Great For The Spring And Summer, One Size Fits All Design Promises A Secure And Comfortable Fit Every Time.