20 mil - Inform the local clientele of your small business by circulating this business card style magnet made in the USA from non-toxic material throughout the town or at a tradeshow. It's flexible, has square corners and a clear protective laminate. The magnet's dimensions are 2" x 3 1/2" overall. A write-on surface is also available. This item is perfect for local tax attorneys and CPA offices that are looking to develop a relationship with the community.