Standard size ceramic C8 magnets. These are 1 7/8" (47.6mm) long by 7/8" (22.2mm) wide and 3/8" (9.5mm) thick.
These are available individually, or in larger quantities. The VHB tape option is good for adhering the magnets to your bicycle wheel, but strapping tape is still REQUIRED to prevent throwing magnets while the wheel is rotating.
NOTE: International shipping of magnet is not possible through USPS. If you are serious, we could quote pricing for FedEx or UPS international.