Jump Zone Trampoline Park Birthday Thank You CardsJump Zone Trampoline Park thank you cards feature jumping kids and bright orange and blue colors. Perfect for thanks you's after a trampoline party. 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 they are