Halloween Costume Party Thank You CardsHalloween Costume Party thank you cards feature cute Halloween characters in costumes. The Halloween colors create a festive 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 hand written 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 they are