This item is made by bonding two pieces of vegetable-tanned leather, approximately 2.5mm thick. It starts as a bright blue, but as it ages with use, it develops a sheen and a more subdued color. It can be used with cards inside for contactless payments. Size: Approximately 10 x 6.5 cm x 5mm thick *Because thick and firm leather is used, it may be a bit tight at first. Please be careful when inserting and removing cards until the leather breaks in. If you purchase multiple items, we will offer a discount to cover the shipping cost, so please inquire. Color: Blue系 (Blue-based) Material: Genuine leather