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 Big Addition $20.00 I Snitch the Best $20.00 Unidentified Frying Object $20.00 Room With a View $20.00