Although new and unused, it has been stored at home for several years. The Chinese size is 16.5, but I believe the Japanese size is probably 17cm. I purchased this item on a flea market site several years ago. There is no Japanese size notation, but as shown in images 5-7, the actual length of the insole is 18cm, and the length of the red line inside is 17cm. Therefore, I am listing it as 17cm. After waterproofing the shoes, I will ship them in a Yu-Packet Plus box via Yu-Packet Plus. I will pack them so that the heel part is folded down to close the box. If you do not want the heel part folded down, and if you need the blue original box in the photos, please let me know in the comments. If you want the original box, it will be shipped via Takkyubin (home delivery service), so it will be an additional 300 yen.