Personalized Cute Jellyfish Big Sis Youth Long Sleeve T-Shirt. Cute big sister, future big sister, big sister to be Youth Long Sleeve T-Shirt - White with adorable, girly, kawaii, jellyfish with bows. For jellyfish 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)