Jackson Walk Jet Size: Regular size (22-24.5 cm) These are indoor shoes, so there is no wear and tear. Reference price: ¥12800 All accessories are included. Quoted from the website below: JACKSON WALK JET was co-developed with Yuko Sumida Jackson, a top dancer recognized worldwide, and is a training sandal that focuses on "soles" and "balance exercises" as a method to create the beautiful legs and posture you've always dreamed of. With its unique structure designed to achieve beautiful legs and posture, simply wearing it naturally makes you aware of your "soles," "toes," and "foot arches," allowing you to exercise efficiently and train the muscles of your "entire legs" in a balanced way, leading you to your naturally beautiful legs. In addition, "leg beauty exercises" using JACKSON WALK JET, supervised by Yuko Sumida Jackson, have also been developed. This is a new concept leg beauty program created by a method that utilizes the original functions of the feet and a world-class top dancer. You can enjoyably and beautifully tighten your legs with rhythmic steps incorporating dance elements. Product features: (1) Unique structure that uses soles, toes, and foot arches You pinch the thong with your toes, stimulating and training the muscles of your soles. This forms the foot arch and leads to correct posture from the soles. (2) High-load balance exercise High-load balance exercise with an R-shape that sways back and forth and side to side, and an unstable sole with a small ground contact area, allows you to exercise effectively and beautifully tighten your legs from your soles to your entire legs.