Choose a robust form of paper, such as cardstock, to ensure your postcard doesn't get ruined in the mail. The postcard you create should be roughly the thickness of a standard postcard. If you're concerned that your paper is too weak, glue more than one sheet together to make it stronger. Also known as postal card, address card, calling card, business card, note card, etc., postcards are small cards with postage stamps or printed graphics used to send messages to friends, family members, and businesses. They are easy to write on and can be mailed at no charge from most local post offices. Postcards are often used as invitations or as promotional tools given away by companies to attract new customers or clients. As well as being used as an advertising tool, they are also popular as a means of communication because of their cost-effectiveness. Postcards can be personalized with the sender's address and message written on them and then sent out en masse. This makes them a useful tool for businesses to reach a large audience quickly and inexpensively. There are many types of paper used for postcards including: blank, preprinted stock, and handmade. Preprinted stock comes in various shapes and sizes and can be bought in bulk for less money per unit. It is recommended that you buy enough paper to cover all of the postcards you intend to send out. This will help keep the mailing costs low.