Plant Peace $20.00 Inside Message you will grow 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". Plant Peace quantity Add to cart SKU: 1056. Categories: Gardening, Peace. Related Products H2O $20.00 I Only Have Irises for You $20.00 Flower Letter $20.00 Hose/Snake $20.00