Headphone holder clip on I designed for the SKARSTA standing deks from Ikea.
Designed this specifically to hold my Surface Headphones 2, but anything not too thick should fit.
Printed this myself by turning the model sideways, 0.2mm layer height and 10% infill. Only supports touching buildplate, so that only the part holding the headphones has supports.
The author hasn't provided the model origin yet.