Green & Yellow Tractor Birthday Thank You CardsGreen & Yellow Tractor thank you cards feature a green and yellow tractor on a green, yellow and gray plaid background. Your little vehicle lover will adore them! 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.