30 mil - Inform the community of your local fundraiser or charity event by using this business card style magnet made in the USA from non-toxic material as an invite. It's flexible, has squared corners and a clear protective laminate. The magnets dimensions are 2" x 3 1/2" overall. A write-on surface is also available. This is perfect for bake sales, local clubs, farmers market, community carnivals, fairs and more. It's also great for school sporting events.