Printed at 0.12, 10% infill. No supports, most printers should handle the bridging on the notches for the screws, and I left room for some sagging.
Holds my big MDR-Z7s no problem, you could scale down if you have smaller cans. You can fix it to the wall with one or two screws, nails or some heavy duty double sided tape.
UPDATE: Fixed a problem that base was not completely flat.
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