Use this postcard coloring book to create beautiful, unique artwork that you can keep for yourself or mail to a friend. The cards are made from heavyweight watercolor paper, letting you use them with a wide range of media, including paints, markers, inks, and colored pencils. 20 cards, each with a different design. 250 gsm acid-free watercolor paper, suitable for use with wet and dry media. Designs printed in a subtle light gray, which is only slightly visible in the finished piece. Spaces on the back of each card for adding a note, address, and postage stamp. Glue binding for easy removal of cards.