In search of safe magnets to use in the classroom or in a children's environment? Hero Magnets to the rescue! Chunky size with magnets completely encased in plastic. Strong display magnets help you get, and stay, organized. Great for whiteboards, filing cabinets, fridges, and more. Each set includes 12 bi-color magnets--flip them over to see a different bright color! Big Blocks measure 2"L x 1"W x .50"T and hold 20 pieces of paper. Each pack includes 12 magnets. Sold as 2 packs for a total of 24 magnets.