Fly With Me $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". Fly With Me quantity Add to cart SKU: 1084. Category: Friendship & Support. Related Products Friends are the Fiber $20.00 Beyond Words $20.00 A Friend is Like a Quilt $20.00 A Simple Thank You $20.00