Dimension:10x6x12 inches. Material??Twill Cloth. Main compartment fits notebooks or folders without bending corners; Front zippered pouch is perfect for pencils, markers, snacks, or treasures; Two stretchy mesh side pockets to hold water bottles. Ideal for children, both girls and boys, between 3 and 8 years old, our rucksack has adjustable shoulder bands for a comfortable fit as they grow. Not machine washable. Hand Wash Only.