What are the measurements of this wedge?It may seem like a mundane detail, but I'm not looking to use it for a Mathews dolly or how some reviewers used it to prop open a door. I'm instead using it as a quick way to take a shoulder camera and place it on the ground when I work sports productions. I need the dimensions because I don't want the wedge to not be wide or long enough for the camera body that the camera falls off.