Never Look Back $20.00 Inside Message Blank Inside Packages of Heartstrings® cards are shrink-wrapped and sold in sets of 10 cards with envelopes. The actual card size is 4 1/4" x 5 1/2". Never Look Back quantity Add to cart SKU: 182. Categories: Sports, Sympathy - Healing. Related Products A Cup of Courage $20.00 Paws in the Flowers $20.00 Just a Little Mistake $20.00 Beyond Words $20.00