Not a Moment to Waste $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". Not a Moment to Waste quantity Add to cart SKU: 10035. Category: Sports. Related Products You Have Learned to Make Friends $20.00 Life is an Ocean $20.00 Run Home $20.00 Coal In One $20.00