Thor the Mighty Avenger Large Backpack Review April 23, 2018September 23, 2018 - ChainWarhawk Thor the Mighty Avenger Large Backpack – 16in Thor School Backpack Full size large backpack measures 16″H x 12″W x 5″D Front zipper pocket for small accessories and supplies Two side pockets with Velcro-Closure ; Canvas fabric, easy to clean