Bough Wow $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". Bough Wow quantity Add to cart SKU: bough-wow. Categories: Christmas - Holiday, Pets. Tags: christmas cards, christmas greeting cards, pet cards, pet greeting cards, unique christmas cards, unique pet cards. Related Products A Friend Knows $20.00 Velo Dogs $20.00 Always There When the Chips Are Down $20.00 You Are So Good to Me $20.00