The back sticker of this mobile phone wallet is made of silicone material. Its size is 2.21*3.4*0.12 inches. The texture is soft and can just accommodate the size of a bank card. It is small and easy to carry. It can replace the wallet to a certain extent and is very popular.Not just a mobile wallet, connect it to your car, desk, refrigerator or anywhere else you want and get extra storage space.