FilmOn FlyGrip Cellphone accessory/Selfie Holder/Kickstand (Black Medium) Works with ALL smartphones and tablets up to 10 inches Securely use your phone with one hand Ergonomically designed to fit comfortably around your fingers Doubles as a kickstand in both portrait and landscape How to get the right size: 'Medium' is for fingers 5/8" thick. If your fingertip reaches the top of President Lincoln's head on a penny, 'medium' is your size. 'Large' is for fingers that are up to 3/4" thick. Your fingertip almost covers the top of the penny.