Teenage Mutant Ninja Turtles Masked Turtles 16 backpack with free turtles masks Teenage Mutant Ninja Turtles Backpack - made for ages 3+. Backpack measures 16" tall and 13" long. Features water bottle holders on each side, 2 zipper compartments, adjustable padded straps with Highly Reflective Strips, and a hook loop. Also come with bonus Ninja turtles red mask.