Indognito $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". Indognito quantity Add to cart SKU: indognito. Categories: Misc Occasions, Pets. Related Products Velo Dogs $20.00 Bone Appetit $20.00 Chews Gifts Carefully $20.00 Starve a Cold, Feed a Retreiver $20.00