Cosmos 10 Sets Name Badges Name Tags ID Holders with Magnetic Backing Attachment Each Badge Back Has 3 strong Neodymium button magnets. Magnetic Badge Holder / Badge Magnets, Plastic Back Plate/Adhesive Tape Size: 1.75" L x 0.5" W x 0.24" thickness No more puncture holes in your clothing Great for office, workplace, law enforcement, school, conferences and crafts