These strong, fast holding magnets boldly broadcast your message for all to see, get yours today! .: Material: White vinyl with black magnetic backing.: Matte finish.: Three sizes to choose from.: For indoor use.: Thin (0.03" (0.8 mm)) and lightweight   6" × 6" 4" × 4" 3" × 3" Width, in 5.98 4.00 3.00 Length , in 5.98 4.00 3.00