25 Round Magnets. This is a new set of 25 round magnets. These magnets are great for home, office, school or shop use. Each measures approximately 3/4" x 1/4" (19 x 6 mm). Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design. Magnets have a flux index less than 50kG2mm2.