This reader can attach to the back of your cell phone so you always have a pair of readers convenient whenever you need to use your phone. It comes with instructions on how to make this work. The glasses, however, are a wonderfully light weight option for you even if you do not want to use them exclusively with your cell. They come in a case that makes them easy to store anywhere you need them. Frame Measurements: 5 1/4" x 1 1/8" (temple to temple x height of lens)