just breathe $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". just breathe quantity Add to cart SKU: 10057. Categories: Food, Humor, Sympathy - Healing. Related Products This Too Shall Pass $20.00 It’s More than the shoes $20.00 Home Home on the Range $20.00 Give Peas a Chance $20.00