This magnetic mount measures roughly 2.5 inches across and deploys a 22mm ball which fits the cradle that came with your GPS (cradle and GPS are not included).

Note:  These only fit GPS devices that utilize the 22mm ball size.  Only the items listed in the title will fit this mount.  The majority of Garmin GPS devices use the smaller 17mm ball size.  We have that size too, just contact us for details.