It's 11.5cm/size M. I'm selling it because my child outgrew it after only wearing it twice. It was only used indoors. I will ship it without the box or stuffing. If you would like the box and stuffing, I can ship it via Takkyubin (home delivery service) for an additional 500 yen, so please let me know. I will not be lowering the price any further, thank you for your understanding.