Personalized Big Sistersaurus with Cute Sibling Dinosaurs Youth Long Sleeve T-Shirt. Cute sister dinosaur watches out for her little dino sibling. Adorable Youth Long Sleeve T-Shirt - White for any sister! youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)