Personalized Never Too Old To Believe Long Sleeve T-Shirt. Cute Christmas Long Sleeve T-Shirt - Pink says YOU'RE NEVER TOO OLD TO BELIEVE with silhouette reindeer and stars. You're never too old for the magic of Christmas. Perfect for adults and aging elves. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL