This is a double-sided card with a green dotted pattern on both sides. The front has a red square with a customizable white letter. Use this card to create a custom party banner. Spell out a special message or name using a card for each letter. Trim away the white triangle sections on each card, then string the cards together with ribbon, string or twine, using miniature clothes pins, or by punching a hole in each top corner of the postcard.