Here is our selection of medium-sized, 24mm (0.94") diameter disc magnets including super strong neodymium disc magnets and great value ceramic ring magnets. Strong neodymium magnets have many creative uses including, arts, crafts, model making, packaging, stationery and displays. They also have many uses in technology and manufacturing where compact size and maximum strength are required. ceramic circular ring magnets are more commonly used in loudspeaker systems and in magnetic rollers for separating applications.