Thank you for viewing! Made with 22mm walnut buttons. The back is felt-backed. Rubber band can be replaced. I make each item with care, but please understand that these are handmade items and consider this before purchasing. Handmade item discount: Buy 2 items, get 100 yen off Buy 3 items, get 150 yen off Buy 4 items, get 200 yen off Buy 5 items, get 250 yen off Discounts cannot be applied after purchase, so please be aware of this.