Card is printed on heavy white card stock. Outside of card: Happy BirthdayInside: Wherever you go, whatever you do... may smiles and happiness be yours all day long! Happy Birthday Dimensions: Each card has a single fold and measures 5 1/4" x 5 1/4" and comes with an envelope. Buy six cards, get one free! (Free card must be of equal or lesser value.) Add seven cards to your cart and the amount for the seventh card will be subtracted from your total. Tip: If you would like to order more than three cards, get the best deal on shipping by combining your card order with a larger item, or a box of up to 20 cards.