TMNT Backpack for Boys - Bundle with 15” Teenage Mutant Ninja Turtles Backpack Kids, Water Bottle, Stickers, More | TMNT School Supplies for Boys 4-8. This Teenage Mutant Ninja Turtles school backpack features adjustable shoulder straps, zip closure compartment, and top loop for hanging featuring colorful new artwork of the Teenage Mutant Ninja Turtles. The TMNT backpack measures approximately 15" x 12" x 5". This TMNT backpack for kids has plenty of space for TMNT folders, notebooks, and books. The front accessory pocket is perfect for holding TMNT pencils, pens, school supplies, toys, snacks, and more. This durable Teenage Mutant Ninja Turtles backpack for girls also comes with TMNT stickers, a water bottle, and a Rex-man door hanger! Officially licensed Teenage Mutant Ninja Turtles backpack school set. Pair this with other TMNT school supplies.