The 'Door Stopper' was inspired by a door that kept getting bumped, leading to the knob slamming into the wall. This doorstop is designed to prevent wall damage, while allowing for door use without removing the door stopper. My door is actually hung at a very slight angle, so it also functions as a door stop. That was a happy accident, but a useful one. The stopper is designed to clip onto a door of approximately 34 to 35mm in thickness.