You Will Heal $15.00 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: 519. Category: Hearts. Related Products Thanks for Your Strength $15.00 Squeeze the Day $15.00 Wishing You a Bee-You-Tea-Full Day $15.00 My Heart Goes Out $15.00