Personalized Pirate 3rd Birthday T-Shirt. Pirate 3rd birthday - Ahoy, matey! A happy pegleg pirate captain and his parrot first mate have found a treasure chest with a golden three. Cute gift for the three year old! Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.