3-pc. neodymium magnet disc set. Each measures 11/16 in. dia. x 1/8 in. thick. The diameter of this magnet is about the size of two dimes, but strong enough to hold a 1/4in. thick pad of 3in. x 3in. sticky notes to a metal filing cabinet. This magnet can also be used to create an invisible magnetic door latch. Warning Powerful attraction force can pinch fingers and chip magnets. Carefully slide magnets apart and together. Material Neodymium, Product Style Holding magnet, Diameter in. 11/16, Thickness in. 1/8.