Our range of 4mm (0.16") wide rectangular magnets include the super-small 5mm (0.2") long magnets right up to our 20mm (0.79") long rectangular magnet with astonishing 1.9kg (4.18lbs) pull. These magnets are incredibly versatile are perfect for fixing things around the house. Each magnet is magnetized through the thickness of the magnet with opposite poles on the larger flat faces.