Brass Magnetic Clasps, Round, Mixed Color. Size: about 6mm wide, 11.5mm long, hole: 1.2mm. Brass magnetic clasps consists of two sides. When put them nearly, they can be absorbed together for their magnetic characteristic. Please note that these products are nickel free except the silver one. So buy this 100 Sets Mixed Color Brass Magnetic Clasps For $12.22 @PandaHall