Personalized Baseball Skull Long Sleeve T-Shirt. Baseball Skull has a pirate skull and crossbones with the skull as part baseball and the bones breaking through. Great gift for any baseball or softball fan who also likes being a pirate! 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