Chalkboard Speech Bubble Thank You CardsChalkboard Speech Bubble thank you cards feature a fun chalkboard background with chalked in stars and various speech bubbles for kids to fill in with notes of 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