Plant seeds of kindness every day $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". Plant seeds of kindness every day quantity Add to cart SKU: 1050. Categories: Friendship & Support, Gardening, Hearts. Related Products Grow a Friend $20.00 Blue Columbine $20.00 It’s not Which Way We Face $20.00 Talk About It $20.00