Thank you for viewing! The size is L! I used it a few times a few years ago, but there are no major stains or scratches. Only those who understand, please! From Patagonia, the bucket hat "Surf Brim" can be used underwater. The material is 100% recycled nylon, which is soft, quick-drying, and easy to care for. It has a quick-drying headband on the inside, and the elastic buckle on the back of the head is adjustable, so it fits snugly on your head. The underside of the brim uses a dark color to reduce glare and eye strain, and it has two vents and water drainage to release heat and water, so you can comfortably spend time at the beach or in the surf. It also comes with an adjustable chin strap, which can be stored when not in use. It can be used not only for marine sports, but also for mountain climbing and outdoor activities in general.