I purchased this in Shiretoko last year. The brim is straight, not curved like a baseball cap, so it doesn't interfere with the frames of sunglasses. It's unisex. The size is free, and it has an adjuster. The head circumference is made rather large. I haven't worn it much because it doesn't suit me. It's a waste, so I'm offering it for sale in the hopes that someone else can use it. Please be aware that this is a used item. I am a private seller, and I have stored and measured the item myself. I have checked the condition before listing, but there may be oversights. Thank you for your understanding. You don't need to leave a comment to purchase, but feel free to ask any questions! I'm sorry, but I can't negotiate on price. I may reuse packing materials in good condition. Thank you for your understanding. I will fold it compactly for shipping. Please understand that there may be creases.