This mount should be able to hold almost any phone, enclosed in the thickest of aftermarket cases, with absolute authority. It's 1-3/8" (1.375) wide, with its jaw depths almost 3/4" (.75). All surfaces able to contact naked phone surfaces are covered with textured and smooth rubber pads. The jaws widest safe-holding gap, at the jaws closest apposing surfaces at full spacing, is 3-5/8" (3.625) - progressively widening towards the main body to grip even wider, but thinner cell phones. The machininSee full review