100% Cotton 100% Cotton Made, lightweight/durable/smooth, comfortable all-day wear. One size fits most. Adjustable metal buckle back closure Size: Adjustable. Circumference: 22.1-24.4inches/56-62cm.Brim: 2.75inches/7cm. Crown: 4inches/11cm. Six-panel unconstructed cap with top button and six sewn eyelets for extra ventilation and breathable comfort. Simple but elegant design. Unstructured floppy and twill low profile design for a casual look.