ProIDMag Magnetic Badge Holders with Plastic Back Plate and Adhesive Tape, Dark Blue/Black, 10 Sets (NAID1647) 10 Sets/Pairs (20 Pieces) of Premium Quality Name/ID Badge Magnetic Backs Each Badge Back Has 2 Strong Rare Earth Neodymium Magnets Magnetic Badge Holder / Badge Magnets, (Silver) w/ Adhesive Tape Size: 1.75" long x 0.5" wide x 0.25" thickness (approx.) Great for office, workplace, law enforcement, school, conferences, crafts and much more