Personalized 4th Birthday Balloon Long Sleeve T-Shirt. 4th Birthday Number 4 Pink Balloon Long Sleeve T-Shirt - White you can personalize. 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