Many of our adjustable hats have a buckle or velcro in the back for the adjustment. The Flex Fit hats sizes we offer are shown below. Feel free to message us for any questions. Contents: 63% Polyester / 34% Cotton / 3% Spandex Sizes: S/M (6 3/4"-7 1/4"), L/XL (7 1/8"-7 5/8"), XL/2XL (7 3/8"-8") We use the 6277 Flex Fit hat's, available in 3 different sizes. Navy, Black and Gray offer the XL/XXL Size. The other colors don't offer the larger sizes. (Don't ask us why..lol) All of our hat ship ship FREE First class mail with tracking. Message us for any questions. Jake Designing and Powercall Sirens offers custom embroidered Flex Fit, Adjustable or Winter hats. They are all embroidered by us in the USA from Northern Virginia. Remember that all of our items are made to order so they are always made fresh and guaranteed brand new. "The Fierstien Brand" Remember that most hats are made off shore. We purchase our hats from USA Vendors and embroider and design all of our garments in Northern Virginia. Please be sure to send us an message with your customizations or special notes once you make your purchase. Payment Shipping Returns Payment Shipping Returns All of our items are paid using PayPal via. All of our items have FREE SHIPPING via USPS FIrst Class mail. Some items have tracking if they are over a certain dollar amount. Small dollar items do not have tracking. Custom garments or decals cannot be returned. We will accept returns or exchanges. Exchanges will require you to cover the shipping cost back to your location. When sending your item back, ensure that you contact us to determine the shipping cost that you need to send with your exchange. Jake Designing and Powercall Sirens offers custom embroidered Flex Fit, Adjustable or Winter hats. They are all embroidered and designed in the USA from Northern Virginia. They are not printed on, as we believe that is a cheap way to go. Get an embroidered Hat that will last! We use the 6277 Flex Fit hat's, available in 3 different sizes for most colors. Some colors do not have XL/XXL. Contents: 63% Polyester / 34% Cotton / 3% Spandex Sizes: S/M (6 3/4"-7 1/4"), L/XL (7 1/8"-7 5/8"), XL/2XL (7 3/8"-8") All of our products ship FREE First class mail. Please note that these come in a box and have a tracking number. Message us for any questions. All of our items are paid using PayPal via. All of our items have FREE SHIPPING via USPS FIrst Class mail. Some items have tracking if they are over a certain dollar amount. Small dollar items do not have tracking. Custom garments or decals cannot be returned. We will accept returns or exchanges. Exchanges will require you to cover the shipping cost back to your location. When sending your item back, ensure that you contact us to determine the shipping cost that you need to send with your exchange. Jake Designing and Powercall Sirens offers custom embroidered Flex Fit, Adjustable or Winter hats. They are all made by us in the USA from Northern Virginia. They are not printed on, as we believe that is a cheap way to go. Get an embroidered Hat that will last! Please be sure to send us an message with your customizations or special notes once you make your purchase. Jake Designing and Powercall Sirens offers custom embroidered Flex Fit, Adjustable or Winter hats. They are all embroidered by us in the USA from Northern Virginia. Remember that all of our items are made to order so they are always made fresh and guaranteed brand new. "The Fierstien Brand" Remember that most hats are made off shore. We purchase our hats from USA Vendors and embroider and design all of our garments in Northern Virginia. Please be sure to send us an message with your customizations or special notes once you make your purchase. (description exceeds maximum possible length)