Kikkerland Cinder Block Refrigerator Magnets Multicolored MG78 Set of 4. Brand New in original package. Construct and artfully arrange notes and reminders with this set of four cinder block magnets. Stick to any magnetic surface. Made of stone and resin with neodymium magnets. Each magnet measures approx. 3/4" x 1 1/4". From a pet friendly and smoke free home.