Paws in the Flowers $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". Paws in the Flowers quantity Add to cart SKU: 314. Categories: Gardening, Pets, Sympathy - Healing. Related Products H2O $20.00 How Sweet it Was $20.00 Talk About It $20.00 Blue Columbine $20.00