Wish a new 18-year-old a happy day with a pop up birthday card made specifically for this milestone year. Card arrives flat and pops up into a 3D yellow number 18, accented with gold foil. Back of card reads: "Welcome to everything amazing ahead—starting with today." Birthday card for him or her measures 5" x 7.2" and comes with an envelope. Printed on high quality paper stock, Hallmark greeting cards are made with paper from well-managed forests. Paper Wonder greeting cards are mini masterpieces featuring three-dimensional scenes made of layers of intricate laser-cut paper that create a moment of wonder and lasting celebration.