I've turned my drawings into postcards. This set includes three colors: simple white, rustic brown, and pale blue. The back doesn't have a postal code box, but I hope you'll enjoy using them as postcards or for interior decoration. * The white postcard is slightly smaller and has "POST CARD" printed on the back. * The color in [Image 6] is the closest to the actual pale blue color. * Please note that these are handmade, so there may be some slight imperfections such as smudges. Thank you for your understanding.