The popular cup holder pedestal is about 5" tall. It features an adjustable flywheel base that expands to fit varying cup holder opening. It however, will not work with adjustable type cup holder openings or those that are quite large such as the ones on the Full Size Chevy trucks. This pedestal does work with most vehicles however for some types of cars, the cup holder is not the best location in which to mount a device. NOTE: This pedestal includes all the necessary adapters to work with the Delphi SkyFi & Roady, and Sirius Plug and Play satellite radio receivers.