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 Baby with bike trailer $20.00 The Plot Thickens $20.00 A Friend is Like a Quilt $20.00 Life is Sweet $20.00