Packing Neodymium magnet is widely used in package button. Usually these magnets are designed by N35grade. Typical sizes are D8x2mm, D9.5x1.5 mm, D9.5x2 mm, D10x1mm, D10x1.5mm, D10x2mm, 12x1.5 mm, D12x2mm, D15x2mm, D15x5 mm, D20x2 mm