Personalized I Found My Unicorn Youth Long Sleeve T-Shirt. A true friend is someone who will recognize you for the unicorn you are. I Found My Unicorn Youth Long Sleeve T-Shirt - Heather, from the children's book "Bob the 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)