thinking of you $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". thinking of you quantity Add to cart Categories: Christmas - Holiday, Friendship & Support. Tags: art cards, friendship cards, holiday cards, unique greeting cards. Related Products Memories, Blue Jeans, Bicycle Seats and You $20.00 A Simple Thank You $20.00 The Past is Gone $20.00 Friends are the Fiber $20.00