A friend of mine asked me to design a simple clip that could hang off the front pocket of a shirt to hold her mask to keep it handy while not being worn.
The clip was made to be quick to print and small, so it is possible that the clip portion will be a bit too narrow on a very thick shirt.
MaskHanger-v2 has a 1mm top clip area for thicker shirts.
This print should work just fine in the current orientation.
The author hasn't provided the model origin yet.