I needed a smaller version of the LTT Magnetic Cable Organizer by Edward so I remixed his model to fit my needs. It uses slightly smaller magnets (2 mm height vs original 3 mm) and doesn't have holes for the rubber feet (to save on space).

External dimensions: 35 x 12.5 x 28.3 mm

Cable hole dimensions (W x H): 10 x 7-13 mm

Magnet holes (H x R): 2 x 10 mm