I purchased this from the official Goyo store. I am selling it because the size didn't fit my head. I only used it once and have stored it carefully. (From the HP) Goyo JET CAP Color: Black (White Stitch) Material: Nylon Size: FREE (approx. 55cm - 61cm) Crown Height: approx. 16cm (flat) Brim Length: approx. 7.5cm. Please note that there may be slight dimensional errors. There are two ventilation holes on each side. The brim has a core that is neither too hard nor too soft, making it easy to adjust to your liking. The model's head circumference is approximately 57cm. Size can be adjusted with the adjuster. The balance between the crown and brim is good, making it easy to wear and match with any outfit!