Personalized Bob is a Unicorn Men's Tank Top. Bob is, indeed, a unicorn. He just needs to believe it, and he can be it. Bob is a Unicorn Men's Tank Top - White, from the children's book "Bob is a Unicorn" by Michelle Nelson-Schmidt. Pre-shrunk 100% cotton 6.1 ounce Quarter turned Adult: S, M, L, XL, 2XL