This doorstop holds your door open with the help of magnets. A magnet with a diameter of 10mm and a thickness of 3mm can be used. It can also be used with a metal disc 25mm in diameter and 1.5mm thick. A magnet or metal disc can then be glued to the door. The magnet/metal disc is best attached to the doorstop with superglue.  The total doorstop is 80mm long, 40mm thick and 40mm high.