Once Upon a Time $15.00 Inside Message Inside: And Happily Ever After 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: 579. Category: Hearts. Related Products I Love You from the Bottom of My Heart $15.00 We Grow Together $15.00 Champagne $15.00 Heart at Work $15.00