Vitamin XC $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". Vitamin XC quantity Add to cart SKU: 669. Categories: Christmas - Holiday, Skiing. Tags: ski, ski cards, ski christmas cards, ski greeting cards, skiing, skiing cards, skiing christmas cards, skiing greeting cards, sports, sports cards, sports christmas cards, sports greeting cards. Related Products Everything’s Gonna Be All White $20.00 Cold Hands, Warm Heart $20.00 Fat, Tired and Merry $20.00 Go to the Forest $20.00