NSFW
I designed this Headphone Holder for my 25mm desk, it fits perfectly and don't need any screws or glue. It prints in one piece.
The v01 model is a blocky design made specially to test the concept, it's very sturdy and simple. About 1h50 to print. (print sideways to avoid supports)
The v02 model was adapted to use less material, print faster and also fit better. It has a seccond slot to hold cable or other stuff, it's smaller and better designed to save space, but keeping the strenght. About 1h20 to print with same settings. (difference here is that it needs supports, but keep it sideways)
Design made in Blender 3.6
Printer: Ender 3 V3 SE
The author marked this model as their own original creation.