Be smart and keep your cards close to you without the bulk of a bag or wallet. Â This custom cell phone wallet attaches to your cell phone with 3M adhesive. This silicone cell phone wallet expands slightly to hold up to 3 cards securely. This custom cell phone wallet offers a large area for your logo to be directly imprinted. Grab these customizable wallets as a perfect for travel, beach days, or a night out. **Please note: This item may not stick to the back of the new iPhone8, iPhone 8 Plus or iPhone X