Blue Columbine $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". Blue Columbine quantity Add to cart SKU: 1137. Category: Gardening. Related Products Grow For It $20.00 The Plot Thickens $20.00 How Sweet it Was $20.00 A New Pea $20.00