Size: 10mm, 12mm, 14mm, 16mm, 18mm Finish: Nickle, gold, anti-brass. Design: Normal, super thin, dish shape. Magnetic buttonSize: 10mm, 12mm, 14mm, 16mm, 18mm Finish: Nickle, gold, anti-brass. Design: Normal, super thin, dish shape. Materail: Iron, metal Usage: Widely used in bags, luggage, clothes and so on