This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/5QDF91YtDBi

The hanger is 45mm from the hook to the lip that stops the headphones from slipping off. The gap is designed to be 13mm, which fit my 12.3mm desk wall near-perfectly after accounting for shrinkage.

This was just a quick and dirty v1, v2 will likely have a small bit to hold the cord, maybe cutouts to save on material.

Wanhao

Wanhao Duplicator i3 V2

Doesn't Matter

No

.2

10%

I printed this with minimal infill, grid pattern, 10% overlap. 3 walls (top, bottom, and walls), and optimized for Walls in Cura 4. 1.2mm wall thickness, .2mm initial layer, .4mm layer height. Printed at 195C extruder, 50C bed. Skirt w/ 2 lines to prime the extruder.