Report as inappropriate

Created one. Hole was tight and the pin needed sanding. Pin in a little too thin for my liking, I'm a little afraid that it might break if you are not careful. Also the width of the clamp turned out a little too big, but inserted couple of paper strips to make it more tight. Still moves around a little. You may consider printing another holder. For example this one (I have not printed this yet but it seems better https://www.thingiverse.com/thing:1657541)

Monster Mouth Headphone Holder - Clampable