A simple model for a door hanger. 

This is my first attempt at making a parametric file. 
It should be adjustable for width, door gap clearance and length. 

The thinnest i've made the gap on the top is about 1mm without failing. 
And have printed models in PETG and PLA, they both seem to work well. 

If the doorframe has a shoulder thats narrower than the gap, it may be worth printing it without a tail and using adhesive on the top to secure.