The petals of these romantic flowers are overlapping paper hearts, inscribed with words or single letters that spell out a message. If you make them with wire stems, the valentines can be displayed in a vase; with ribbon stems, they can be tucked into envelopes.
In the early part of the 19th century, letters were not mailed in envelopes. Instead, they were folded and the addresses placed on the outside of the sheet. A homemade card certainly calls for an envelope that's equally as special. It's easy to create one that's customized to the size and shape of your card.