Rectangle with round corners. Power Magnet measuring 3 1/2 x 6. More power to you for choosing this great product! With a total thickness of .055 mil, our rectangle power magnet with rounded corners encompasses 3 times the thickness and holding power of our regular magnets; it can hold up to 8 pieces of paper! Customize with a four color process imprint and hand out at your next convention or tradeshow! Always-in-stock item.