Community Face Mask Clasp

I needed a clasp for a homemade community face mask.
The cord I've used is not flexible/elastic. I used a knot to fix it behind my head but this was very cumbersome.
Therefor I searched for a solution where I can have a quickly connect the two ends of the cord.

You just need a little force to connect the two pieces. You will not be able to slide them in from the top. To detach the two pieces just also use force, but with a little angle. Similar to rip a piece of paper apart.

The STL file fits for a normal cotton cord you would find in a hoodie.

This is remix from Bluebie's Choker Clasp. I've adjusted the OpenSCAD file to have only one whole to support a bigger cord.
There are variables to set the size of the hole, the width, and the height of object.