The unleashed heart $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". The unleashed heart quantity Add to cart SKU: 878. Category: Hearts. Related Products My Heart Bleats $20.00 Each of Us Makes a Ripple $20.00 All I See Is You $20.00 Bless Your Heart $20.00