Personalized Cordelia and Birds Believe in Yourself Youth Long Sleeve T-Shirt. If you believe in yourself, you can achieve whatever you set your mind to. Cordelia and Birds Believe in Yourself Youth Long Sleeve T-Shirt - White, from the children's book "Cordelia" by Michelle Nelson-Schmidt. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)