Personalized Cute Octopus Big Sis Youth Long Sleeve T-Shirt. Cute big sister, big sister to be, future big sister Youth Long Sleeve T-Shirt - Vintage Black with adorable, girly, kawaii, pink octopus with hair bow. For octopus lovers and sea lovers. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)