Personalized Bob is a Unicorn Youth Long Sleeve T-Shirt. Bob is, indeed, a unicorn. He just needs to believe it, and he can be it. Bob is a Unicorn Youth Long Sleeve T-Shirt - Pink, from the children's book "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)