Kids Birthday Card Variety Pack (24 Foldover Cards and Envelopes) Kids Birthday Card Variety Pack (24 fold-over cards and envelopes) 4 each of 6 unique designs. Premium 100# Classic Crest Bright White Cover Stock with blank matching envelopes. 8.5" X 6" flat, 4.25" x 6" folded. Scored but shipped flat for easy personalization. Designed for writing on the inside of the card.