Personalized Most Wonderful Time Long Sleeve T-Shirt. It's The Most Wonderful Time of the Year! Festive holiday sentiment celebrating the season. Happy Holidays and Merry Christmas! 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