This phone holder is designed to be used in most vehicle cup holders. It supports iPhone 6/6s phones along with their cases; it may be used with other phones of similar sizes as well. It has been tested with an iPhone 6s in a Spigen Tough Armor case. It comes in two heights: 3 inches and 3.6 inches.
Also works well in a 1993 Cadillac Deville cup holder. ;)