Marvel Spiderman Mini Toddler Preschool Backpack (11") (Spider-Man School Supplies Bundle). Deluxe Spiderman Backpack for Toddlers features adjustable shoulder straps, zip closure compartment, and top locker loop for hanging. Toddler Backpack measures approximately 11" x 8" x 4" -- the perfect size kindergarten or preschool backpack for back to school. Sure to excite any fan of Spiderman and superheroes! Officially licensed Marvel Spiderman school supplies products -- for boys and girls alike.