Personalized This Kid is 5 Birthday Long Sleeve T-Shirt. This kid is Five! Celebrate your child's fifth b-day with this cute thumbs up 5th design. Happy Birthday 5-year-old! 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