Personalized Future Basketball Player Outfit Long Sleeve T-Shirt. When I grow up Im gonna play basketball cute sports themed Long Sleeve T-Shirt - Purple for baby boy. 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