Personalized Let's Go Exploring with Cordelia Youth Long Sleeve T-Shirt. Adventure awaits with Lets Go Exploring with Cordelia Youth Long Sleeve T-Shirt - White, perfect for little explorerers and fans of 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)