Adjustable buckle closure,one size fits most. Our Adjustable American Flag Cap Great choice for regular daily use and outdoor activities especially like bush walking, fishing, running, hitch-hike travel, baseball, cycling, golf, tennis. Great gift for family, friends, co-worker, Veterans, Patriotics and so on. Easy to match & perfectly suited for dressy or casual outer wear. Breathing hole design increases the permeability of the hat. Comfortable for all-day wear.