Personalized Robot 1st Birthday Long Sleeve T-Shirt. Little robot 1st birthday I'M ONE Long Sleeve T-Shirt - White with cute robot, stars and red planet with the number 1. 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