Narwhal Unicorn of the Sea Birthday Thank You CardsNarwhal thank you cards feature the cutest narwhal with a beautiful rainbow background. With every color of the rainbow it is a fun way to send your thanks. Some features of our thank you cards: Professionally printed on 80# cardstock paper so you feel the quality. Teaches children how to send a meaningful handwritten note Easy to use because all you have to do is simply fill in and mail out 10 cards and 10 white envelopes included 4. 5" X 5. 5"so