Customization and Shipping Included. Choose 1000 or more for the best price. Post cards are a great way to promote your special day. If you do not see a postcard that you like, feel free to let us know what you would like and we'll design it at NO EXTRA CHARGE! Choose the size card you want, and place your order. In the space provide on the online order form, describe what you would like, we'll design it and e-mail you a proof.