Personalized Believe in Yourself Long Sleeve T-Shirt. If you believe in yourself, you can achieve whatever you set your mind to. Believe in Yourself Long Sleeve T-Shirt - White, featuring the brave and confident "Cordelia" from the children's book by Michelle Nelson-Schmidt. 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