Grow For It $20.00 Inside Message Inside: We are So Proud of You 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". Grow For It quantity Add to cart SKU: 591. Categories: Gardening, Hearts. Related Products Flowers Chase the Blues $20.00 Give Peas a Chance $20.00 Where the Heart Goes, Flowers Grow $20.00 A New Pea $20.00