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 Buy Now Pray Later $20.00 Everything is Within Reach $20.00 Close Knit Friends $20.00 May You Always have Tailwinds $20.00