Sincerely Yours Coloring BookArt belongs in every day and every letter! And trust us, your snail mail has never looked better. This coloring book features 20 ready to color greeting cards and matching envelopes so you can make them your own. Color them in, then cut and fold on the provided lines and glue or tape the envelope together to get your card USPS ready. The designs are printed on high quality heavyweight paper to keep markers from bleeding through to the writing space.