Celebrate Something Every Day $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". Celebrate Something Every Day quantity Add to cart SKU: 323. Categories: Baby - Parenting, Birthday, Humor, Thank You. Related Products Mind over motor $20.00 Speak Love, Sing Faith $20.00 Thank you $20.00 Acute Pain $20.00