The Wish $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". The Wish quantity Add to cart SKU: 398. Category: Birthday. Related Products Mountains of Wishes $20.00 A Little Bird Told Me $20.00 Never Fear, One More Year $20.00 It’s your turn to wear the crown $20.00