Personalized Las Vegas Birthday Girl Long Sleeve T-Shirt. Long Sleeve T-Shirt - White with Las Vegas welcome sign that says I'M THE FABULOUS BIRTHDAY GIRL. 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