This headphones stand was designed to be minimal. In my previous attempt at a headphone hook, the material started to droop after a while with heavier headphones. So I redesigned it to come up with this model that will take support from the surface below which this is mounted. I will report back to update how this fared over time. 

The dimensions for the part that goes into the gap between the desk and the table top is 80mm and the part that rises to the tabletop is 20 mm (inside dimensions). You can change these dimensions to suit your table as required. 

Use the long tip version if you need the top lip to be longer for more stability.