I purchased this from the official AKAISHI online store a few years ago. I used it daily. Model number: 601 Retail price: 4,200 yen (tax included: 4,620 yen) Color: Purple Size: L (24.0-24.5cm) The following information is from the official website: You'll be hooked once you wear them! Relieves fatigue from the day Indoor slippers with powerful acupressure 【POINT】Supports the arch to prevent foot problems By supporting the three arches (inner longitudinal arch, outer longitudinal arch, transverse arch), it firmly supports collapsed arches from the soles of the feet and prevents foot problems. 1. Inner longitudinal arch support: Supports flat feet and foot fatigue 2. Outer longitudinal arch support: Supports O-legs and knee pain 3. Transverse arch support: Supports bunions, metatarsalgia, and Morton's neuroma Functions of this product The instep opens wide, allowing you to adjust the size to your liking. You can wear them without losing the fit, even if you have a high instep or a low instep. You can reproduce the way you walk barefoot by firmly stepping with your toes when kicking off, preventing problems around your toes. Applicable widths A B C D E 2E 3E 4E F Material Upper: Artificial leather Insole: Urethane, artificial leather Sole: Artificial leather Heel height: 3.0cm (heel difference height: 0.8cm) * Heel difference height is the height obtained by subtracting the thickness of the toe part from the overall heel height. Please use this as a guide for the height you will actually feel when wearing them. About heel difference height Weight / per foot 150g (per foot / M size reference value) Country of origin: China This product is not a medical device. It is designed to support the feet and improve comfort, and does not guarantee treatment or improvement. The above information is from the purchase site. - Brand: AKAISHI - Color: Purple - Material: Suede-like - Design: Open toe