Personalized Sun Stick Girl Little Sister Long Sleeve T-Shirt. Little sister Long Sleeve T-Shirt - White with a funny, little cartoon stick figure baby in diapers wearing a pink T-shirt with a sun on the front. She says I'M THE LITTLE SISTER. 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