A lens cover selectively covers and exposes a camera lens on a mobile device, such as a cellular phone, laptop or tablet. The lens cover can be adhered to the mobile device. The lens cover has a slider that slides between an open position and a closed position. Indicium is disposed on the exposed face of the slider that is indicative of or representing a business, a product, or both. The base and the slider have perimeters with a length less than approximately 20 mm and a height less than or equal to 8 mm, and/or a ratio of approximately 19:8.