This is a simple little shim to help mount a door hinge slightly further away from the door frame stop moulding. You tuck it behind the door hinge and the little lip pushes the door farther from the stop moulding.

Or it could push the door closer to the stop moulding, if you put it on the door side of the hinge. I have printed a bunch of these for most of the doors in my house, and each one takes about 11 minutes on my Ender 3.

This is available as a parametric model on Onshape here.

More images on my blog here.