Personalized Little Monkey Girl 1st Birthday T-Shirt. Celebrate your 1st birthday with this cute T-Shirt - White THIS LITTLE MONKEY IS ONE design that has a cute smiling monkey holding a banana on it. 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.