This is a BS Fine "Wearable Ganbanyoku" (Hot Stone Bath) Experience Wristband (Gray). My family uses these, but I have a lot of them, so I'm selling this one. It's 15cm long. I opened it intending to use it, but it's a new, unused item that has been stored. - Brand: BS-FINE - Product Name: Experience Wristband - Color: Gray - Features: Wristband that supports the wrist - How to use: Wear it on your wrist