Personalized Unicorn Birthday Train Long Sleeve T-Shirt. A cute rainbow colored unicorn rides a steam train and lets the world know It's My Birthday! Cute gift for anyone who loves unicorns and trains. 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