This is a headphone holder, you will need to find a way to stick it to something.I used some double sided tape, 2 pieces, on the back of the holder. It has been holding really well on some glass I have stuck it to. I used removeable double sided tape that is only rated for 1 pound and it is somehow holding well. You can just peel the tape off when you want. Or Command Strips would work as well, though they might be larger than this part. It is 2.5tall x 1.9 wide, and 2.7" long.Just get something like this:https://www.amazon.com/Amkurson-Mounting-Removeable-Adhesive-Waterproof/dp/B0C7VBVRS8/ref=sr_1_18?crid=3TNXHMEL11H3T&keywords=double+sided+tape+removable&qid=1703068824&sprefix=double+sided+tape+removable%2Caps%2C107&sr=8-18

PRINTING:I printed on a flat plate, I believe the cool plate for the Bambu Lab X1C. That might affect the adhesion of the tape to the part. I believe I printed at about 10% infill and 4 wall loops. I just used PLA. It's more than sturdy enough unless you have like 20 pound headphones. I don't think you have 20 pound headphones. I printed it standing up, on the large flat surface of the part. I used tree supports under the lip at the end. There is a choking hazard if you put this in a blender and try to swallow the parts...just a heads up.

SIDE NOTE:You don't even need to use this for headphones. Leftover tacos? Sure, just set them on here until you are ready to eat them.
Rolls of tape? Cables? I don't know, use your imagination. I'm through with the handouts for now. Have a good day.