Happiest Camper $20.00 Inside Message Blank 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". Happiest Camper quantity Add to cart Categories: Friendship & Support, Peace, Sports. Tags: art cards, art greeting cards, artistic greeting cards, blank cards, camping, camping greeting cards, sports, sports cards, sports greeting cards, unique cards, unique greeting cards. Related Products Light a Candle $20.00 Buy Now Pray Later $20.00 Chocolate for My Bud $20.00 Room With a View $20.00