WTAPS Jet Cap Color: Black Material: Nylon Size: Free (Adjustable) Brim: Approximately 7cm Height: 12cm Size before adjustment → The size is the same as a general free-size cap. Size: Free (Adjustable) Brim Length: 7cm (measured at the center) Depth: 16.5cm to 17cm from the top (measured along the outer curve of the hat with a soft measuring tape, not the inside)