This is the popular Nike "SHOX R4" model (retail price: 21,230 yen). The size is women's US 7.5 (24.5 cm). The following is a product description: The Nike Shox R4 is a remake of the popular model released in 2001. It inherits the synthetic material and textile upper, design lines, laser-cut ventilation holes, and more from the original. Nike Shox cushioning provides performance-oriented style. It distributes weight and provides exceptional comfort. This is a new item purchased at a Nike directly-managed store. I have various other items for sale! Please check them out. Model number: IB8062 133