I purchased this from SHEL'TTER's online store a few years ago. It's made entirely of sweatshirt material. It has some stretch, but unlike regular caps, it fits snugly on the head, so it feels a bit small. Roughly measured, the diameter is about 19-20cm, and the brim is 6cm. It's the type that you wear deep on your head. Recommended for those who want a secure fit and those with smaller heads. Includes shipping. This is a personal item stored at home. Please consider purchasing if you understand. #work cap #military #cap #hat #sweatshirt #sweat #shel'tter #shelter