Mickey Mouse Backpack for Kids Toddlers - Bundle with Deluxe 12" Mini Backpack with 3D Ears Plus Stickers, Water Bottle, More | Mickey School Supplies Set. Mickey Backpack set includes 12" backpack with padded adjustable shoulder straps, zip closure main and front compartments, 2 mesh side pockets, and top locker loop for hanging. This Mickey Mouse mini backpack measures approximately 12" x 9" x 3.5" and features 3D Mickey ears! This Mickey Mouse mini backpack is perfect to use as a school bag for boys and girls or everyday backpack for adults. Officially licensed merchandise, sure to delight any Mickey fans - girls and boys of all ages also comes with Mickey stickers, a Beach Kids water bottle, and a Beach Kids castle door hanger.