Personalized Cute Seahorse, Green Seahorse, Sleeping Seahorse Youth Long Sleeve T-Shirt. Cute, fun and adorable design with green seahorse. Modern and trendy gift, perfect for the seahorse 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)