Personalized Little Monkey 1st Birthday Boy T-Shirt. THIS LITTLE MONKEY IS ONE 1st birthday T-Shirt - Gold with a cute smiling boy monkey holding a banana. 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.