May Peace Surround You $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". Quantity Add to cart SKU: 633. Categories: Christmas - Holiday, Peace. Related Products A Little Peace of Christmas $20.00 Chews Gifts Carefully $20.00 Vitamin XC $20.00 Everything’s Gonna Be All White $20.00