Once in a while, I dig in my heels $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". Once in a while, I dig in my heels quantity Add to cart SKU: 848. Category: Gardening. Related Products We Grow Together $20.00 If Fences Were Flowers $20.00 Give Peas a Chance $20.00 Flower Letter $20.00