Custom Magnets, Business Card Magnet - 2x3.5 Surface, Are you looking for a way to promote your business while also showing off your creative side? Then business card magnets just may help you achieve that goal! This handy marketing tool features a 2" x 3 1/2" imprintable surface. Great for networking sessions and trade shows, these customizable business cards keep your brand in easy view! Perfect for insurance agencies and contractors. ... #BC1 $0.41/each.