Personalized You are the best Unicorn I have ever seen Youth Long Sleeve T-Shirt. When no one else sees Bob as a Unicorn, his friend the Fairy knows just what to do. You are the best Unicorn I have ever seen Youth Long Sleeve T-Shirt - White, from "Bob is a Unicorn" 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)