Friendship is Continuous $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". Friendship is Continuous quantity Add to cart SKU: 47. Category: Friendship & Support. Tags: art cards, art greeting cards, friendship cards, friendship greeting cards, support cards, support greeting cards, supportive cards, supportive greeting cards, unique cards, unique greeting cards. Related Products May You Always have Tailwinds $20.00 The Past is Gone $20.00 Haven’t Seen You in Many Moons $20.00 Beyond Words $20.00