This essential Soft Silicon Mobile Wallet adheres to the back of your device and holds up to three cards securely. The adhesive Card Holder also features a large Imprint Area of 1.25″W x 1.25″H Ideal for Maximum Brand Exposure. Sticker makes the card holder strong enough on any smooth surface, such as normal glasses, smooth cell phone cases, leather phone case. It can not only be attached to back of phone, it can stick on every smooth surface place. Add a extra pocket in car, computer or on the fridge and have more storage space. Just peel off the cover of the phone wallet, stick on back of phone, and finish by softly pressing.