As Seen on TV. Fold two flaps in and you have a heart-shaped pocket - a Heart-velopeŽ. Fold all four flaps and you have a square envelope. Add style to your envelope making and dimension to your scrapbook pages in seconds. Great for adding a heart-felt touch to a gift, holding photos & mementos in scrapbook pages and envelopes for letters. The 4" template makes 4" x 4" envelopes when all four flaps are folded. Check with your local post office before mailing.