I have done so much trial to understand that the best way to accessorize headphones like XM5 (Flat on the outside of the ear cup) is to have it stick on with double side tape (Strong ones)

And keeping that in mind, i have created a few designs the i will be uploading. so enjoy!

This particular design has a hole at the top center, so this one can also be doubled as an earing or a keychain (by scaling it down)

These designs have a flat base so you wont need support Your choice of resolution DOUBLE SIDE TAPE NEEDED