I opened it and tried it on once, but it was a little too big for my wrist, so I immediately put it back in the original case. I'm selling it because I repurchased a 16cm one. It's a light accessory that supports your health, please refer to the description in the photos. - Brand: Phiten - Model Name: RAKUWA BRACELET S DUO II - Color: White/Black - Size: 18cm