Head circumference: 50cm-52cm, Depth: 10cm-12cm It has elastic and stretches slightly. *Measured by hand, so please consider it as a guideline. *My 6th-grade child wore it, and it was a little big. Made by Bandai, so I believe it's an official licensed product. Worn only once at a spring recital. There were fold marks from when I bought it. There is a snag on the top of Mario's head (see photo 3). It's only noticeable up close. Will ship via Nekopos. #Mario #SuperMarioBros #Halloween #Costume #Cosplay #Kids #Adults