My Heart $20.00 Inside Message Inside Message: is tied to yours 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 quantity Add to cart SKU: my-heart. Category: Hearts. Related Products We Grow Together $20.00 The Common Rope of Hope $20.00 I Only Have Irises for You $20.00 You Are So Good to Me $20.00