My Heart Bleats $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". My Heart Bleats quantity Add to cart SKU: 480. Category: Hearts. Related Products A Delicious Day to Remember $20.00 Thanks for Your Strength $20.00 The Beet Grows On $20.00 The Plot Thickens $20.00