We all Swim Upstream $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". We all Swim Upstream quantity Add to cart SKU: 140. Category: Sympathy - Healing. Related Products Haven’t Seen You in Many Moons $20.00 High Hopes $20.00 Everything’s Gonna Be All White $20.00 Trust the Moon $20.00