I printed my growing hearts design onto 65 lb, acid free, ivory card stock with pigment-based inks for superior smudge- and fade-resistance. The smallest heart reads, "yesterday." The next says, "today," the biggest heart is labeled as "tomorrow."
The card is 4 X 5.5 inches and comes with a matching ivory envelope. The card stock is very slightly textured, and you can see some subtle speckling in the finished color, which gives it a charming, rustic finish. The inside is blank for your message. The back has a sweet, simple reminder all along the bottom, "and the day after that...and the day after that..."
It is packed and shipped carefully in a bend-proof mailer.