Personalized If You Dream It You Can Do It, Mermaid Tail Youth Long Sleeve T-Shirt. Cute, fun and adorable design with mermaid silhouette and text 'If you dream it you can do it'. Modern and trendy gift, perfect for the mermaid lover in your life. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)