A pair of cat ears to put on anything, based on the Halo Ears by Gerard2567. Works best with a headband on headphones (or hearing protection). The ears only need a short length of 3/4" double sided Velcro tape (Like This) to wrap around the headband and attach it. NOTE: This Velcro tape does NOT have adhesive, one side is the Loop and the other is the Hook, it will attach to itself and not the headband. All you need to do is thread a length of this self-sticking Velcro tape through the hole at the base of the ears and around the headband, with the soft loop side facing out so it can't snag or be a nuisance.

I currently run these on a pair of Walkers Slim Electronic Muffs, but it will work on any headset/headphones that have a traditional headband. The earmuff band is about 50mm wide, so thats how wide these are, but it can be scaled in the Z axis to accommodate thinner headbands. They are also fairly large, so if desired it can be scaled down in your slicer of choice, however any scaling other than the Z axis will necessitate cutting down the Velcro Tape or even requiring a file if it becomes too thin.

They can be printed back-side down with no supports required, and with 10% infill or more.