Peace On Earth $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". Peace On Earth quantity Add to cart SKU: 10106. Categories: Christmas - Holiday, Peace. Related Products Chews Gifts Carefully $20.00 High Hopes $20.00 Warm Christmas Wishes $20.00 Going Downhill Without You $20.00