A headphone holder you can attach to your desk using 3x 4mm screws. Choose a length suitable for your desk. Adhesive tape might work as well.

Print it with stronger infill at the desk edge to increase the strenght and prevent it from breaking. It prints well without supports.

There are two version. One for desks with a 90 degree angle and one with a 45 degree chamfer as seen in the pictures. The step files are included too.