Little Rubber Duckie Birthday Thank You CardsLittle Rubber Duckie thank you cards feature a bright yellow duckie floating in the water. Surrounded by bubbles these make a splashy 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