Cable Clip 1 (the smaller variation):  Uses a 6mm diameter magnet with 2.75mm thickness.  This one is a good size for something like a phone charger cable.  Uses about 0.74 meters of filament.

Cable Clip 2 (the larger variation):  Uses a 10mm diameter magnet with 2.75mm thickness.  This one is better for bulkier cables with more weight.  Uses about 1 meter of filament.

Magnet can be secured in place using something like super glue or Shoegoo.  I don't recommend using the gcodes provided as I included them just to show how much filament is used.