We All Have a Simple Spirit $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". We All Have a Simple Spirit quantity Add to cart SKU: 495. Category: Hearts. Related Products My Heart Bleats $20.00 Thanks for Your Strength $20.00 Art is Therapy $20.00 I Love You from the Bottom of My Heart $20.00