Personalized Little Monkey 6th Birthday Boy Long Sleeve T-Shirt. THIS LITTLE MONKEY IS SIX 6th birthday Long Sleeve T-Shirt - White with a cute smiling boy monkey holding a banana. 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