Lampshade - restructured for my "screw-on" shade lamp.

thingiverse

Using Tinkercad, I restructured the original to fit a lamp I have that has a screw down base for the lamp shade. There is a big retaining ring that you remove and then place the shade and the retighten. Without a bulb as well, of course. In my case, the diameter of the bulb socket holder without the retaining ring is 35mm (inner) and the diameter to clear the retaining ring must be 55mm (outer) or larger.