Personalized 1st Birthday Turtle T-Shirt. A cute little turtle jumps for joy for its giant birthday cupcake with sprinkles and a 1 candle on it. Adorable first birthday gift. 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.