Like our clamp collection we have tried many suction cups over the years. This one is very suitable for any small camera. We like using suction cups on windows for interior construction as typically windows are not touched until final cleaning. Often a clamp or other mount may need to be moved when drywall is going up, painting, trimwork, etc. Having a suction cup is often a perfect solution. This would also be a great mount on an interior car window for a drive lapse which we often mount a camera upside down, near the rearview mirror. We would not recommend this suction cup for any surface other than glass or for exterior vehicle use. The Delkin Fat Gecko has more holding strength, but is a more costly alternative. The suction cup diameter is 3.5 inches and the overall height, or length, depending on the orientation and tilt of the head is 5.25 inches.