Instill the will to give $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". Instill the will to give quantity Add to cart SKU: 857. Category: Hearts. Related Products Chocolate for My Bud $20.00 You are the Rock in My River $20.00 You Are So Good to Me $20.00 My Heart Bleats $20.00