These full encased Magnetic Glassboard Magnets on this page are especially designed for use on Magnetic Glassboards. Both the 2″ Diameter Button Magnets, and the 1-3/8″ Diameter Glassboard magnets are designed to hold 20 sheets of paper to a 1/4″ thick Magnetic Glassboard. The larger 2″ size are easier to grasp, and work well in elementary education settings. Both sizes are available in a variety of colors. Primarily for use on Magnetic Glassboards but may also be used cautiously with porcelain boards or magnetic whiteboards as they may be difficult to remove.