Sea Animal Thank You Cards (24 Foldover Cards and Envelopes) Kids Thank You Cards Sea Animals Note Cards (24 fold-over cards and envelopes) 6 each of 4 unique designs. Premium 100# Hammermill Bright White Cover Stock with blank matching envelopes. 4.25" X 6" after folding. Scored but shipped flat for easy personalization. Designed for writing on the inside of the card.