Personalized Firecracker 3rd Birthday Long Sleeve T-Shirt. Cute Long Sleeve T-Shirt - Charcoal 4th of July 3rd birthday design with a big blue number three firecracker filled with red and white stars and star burst. Perfect for 4th of July third birthdays! 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