20 mil - Promote your local business to the community by sending out this business card magnet is made in the USA from non-toxic material. It has square corners and a clear protective laminate and measures at 2" x 3 1/2". A write-on surface is also available. This item is a perfect giveaway for corporate tradeshows. It works well as a favor to first-time clients. Itss also a great way to inform the neighborhood of your business's opening week! Order yours now!