Safari Hat and Bumper Sticker by Buy Caps and Hats. Adjustable chin strap. Neck flag for more sun/wind protection. Air vents to help keep head cooler in warm/hot conditions. Large brim/rim to protect ears, head and face from elements. Sizes for these hats are approximately: SMALL- 19 to 22 Inches, MEDIUM- 20 to 23 Inches, LARGE- 20 to 24 Inches, X-LARGE- 21 to 25 Inches. LARGE, Safari Hat/ Fishing Boonie in Khaki/ Dark Beige Color with chin strap and Bumper Sticker by Buy Caps and Hats. Can be used for rain protection (best if Scotch Guard is used to prevent the rain from penetrating fabric). Use for fishing, safari excursion, outdoors, gardening, at the beach, construction, winter or summer head protection.