Tuga Adult UPF 50+ Cabo Wide Brim Hat with Chin Strap (UV Sun Protective) Imported Adult Unisex Sun Protective Wide Brim Canvas Hat with Chin Strap. One size fits most with circumference of 22.5" inches. For reference, they would be considered an adult hat size Large. UPF 50+ for Ultimate Sun Protection, Blocks Damaging UVA/UVB Sun Rays Wide 3.5" Brim and Vent Holes on Sides for Extra Cooling Adjustable and Removable Chin Strap for a Better and More Comfortable Fit Tuga Logo Embroidered on Side