Head Circumference: Free (M) size 56-58cm Brim, Height, etc.: Height approx. 9cm, Brim approx. 6cm [100% Complete Light Blocking] Astonishing 100% light blocking rate, UV cut of 99.9% or more! Protects your skin and hair from UV-A and UV-B rays, which can lead to skin aging such as spots and wrinkles. [Size Adjustable] An adjuster (size adjustment tape) is attached to the inside of the hat, allowing for fine adjustments to the size. You can wear it at your preferred size, such as when you have your hair curled or when you want to wear it without feeling constricted. [Unisex] Available in 3 sizes, accommodating up to 63cm, making it suitable for unisex wear and a great gift. [Versatile for Various Occasions] The simple design makes it easy to match with any style, perfect for daily use and when you want to dress up for a day out.