Warm Words $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". Warm Words quantity Add to cart SKU: 1060. Category: Hearts. Related Products I Love You from the Bottom of My Heart $20.00 You Are So Good to Me $20.00 Art is Therapy $20.00 Heart at Work $20.00