A simple door hook in various sizes!

I've uploaded the hook for normal standard doors, these should fit on most doors.
The door can be up to 43.5mm thick and have a rebate up to 26.5x14.3mm. The thickness of the hook is 1.6mm in the area inside the rebate.
Due to the wide contact surface and the optimal print alignment, it is nevertheless very sturdy.

If your door has dimensions that are not compatible with the standard dimensions, you can open the f3d file in Fusion360 and adapt the hook. You can do this in the parametric settings of the design.