DescriptionHarry Potter backpack bag size. Large capacity: 36-55 litres Opening: zip Material: oxford fabric Function: waterproof, breathable, abrasion resistant, load shedding, impact resistant Hardness: medium Oxford fabric Function: waterproof, breathable, abrasion resistant, anti-theft, load shedding, impact resistant Hardness: medium Style. Casual lining texture. Type of accessory: nylon. Mesh pockets on both sides of the buckle for umbrellas and mugs Main bag: A4 books can be placed Waterproof structure: frontal waterproof material combined with high-density material to prevent water from seeping into the bag Backpack size Length: 31 cm Width: 16 cm Height: 43.5 cm