I needed a way to hang a mask that did not have any mounting features on it other than the eye holes. This goes together using mini french cleats and a clip to hold everything together.

Print:

1 of the Base

2 of the Arms, with one of them mirrored in your slicer

1 of the clip

I printed everything at 100% infill from PETG. I included two photos of the mask hanging - one with the hanger in white so you can see how to use it, and one in black where the hangers disappear into the eyes.