Acute Pain $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". Acute Pain quantity Add to cart SKU: 59. Categories: Baby - Parenting, Humor, Women. Related Products A New Pea $20.00 Give Peas a Chance $20.00 Light a Candle $20.00 Just a Little Mistake $20.00