100% cotton circumference about: 22-23inch(55-59cm). The back of vintage dad hat with adjustable metal closures design to better fit the head. One size fits most. The brim of cap about 2.8inch, keep the sun out of your face in summer This Hat Has An Adjustment Buckle On The Back, You Can Freely Adjust The Size Of The Hat Circumference To Adapt To Your Head. It Is Also Perfect For Teenagers! Ideal For Daily Wear, Outdoor Activities, And Travel, This Lightweight And Easy-To-Carry Cap Adds A Trendy Touch To Your Outfit. Stay Fashionable With Our Adult Washed Denim Baseball Cap. If There Is Any Problem, Just Contact With Us, We Will Deal With It Immediately. Introducing Our Washed Denim Baseball Cap, A Versatile And Stylish Accessory For Any Occasion. Made From 100% Cotton, This Cap Is Both Comfortable And Durable. The Classic Curved Brim And Adjustable Metal Buckle Provide A Secure And Customizable Fit, While The Breathable Fabric Keeps You Cool And Dry.