Magnet - 3.375" x 4.875" Rectangle with Square Corners - 30 Mil. Keep your message in front of your clients. Personalized with your services and contact information, a magnet is an effective marketing tool. Magnet keeps selling long after other products have been tossed away and forgotten. Magnet sticks to refrigerators, filing cabinets, appliances, vending machines, lockers and any other metal surface. 30 mil. thickness will hold paper, pictures and more.