Officemate Assorted Color Heavy-Duty Magnets Package of 30 work well on file cabinets or metal presentation boards. They are three times stronger than regular magnets. Reusable tub contains 12 small, 12 medium and 6 large magnets in assorted colors (red, yellow, white, blue and green). The small size measures 5/8" in dia, medium magnet size is 1-1/8" dia.
