Thank you for your interest in my item from among many others! I am selling this to organize my belongings. ◯ Size (Measurements are approximate) Head circumference (inner): approx. 55cm Brim depth: approx. 5.5cm ◯ Material: 100% cotton It seems to be made with good breathability (as shown in image 8). It will be shipped via Yu-Packet Post. Although it is new and unused, it has been stored at home, so I would appreciate it if you could understand and be tolerant. *The color may differ slightly from the actual product due to the shooting environment.