The file 'Apple USB-C To 3.5mm Keychain 3D Printer Model' is (stl) file type, size is 999.3KB.
My conditions were to be as small as possible and be secure. The 3.5 plug type didn't really hold on the well even though I did love the size. The other ones that held are securely were either wide or thick.
I did print with supports for the nub, Keep in mind you'll need an excato or another extremely small tool to get the support out. I sliced with Slic3r so if you're using cura you may want to make custom support.
Apple_Headphone_Keychain_V1.2.stl | 2.6MB |