Large CapacityA4 size, bigger than A4 plastic envelope wallet. Holds up to 2.8'/7cm, 1000 pages large capacity, with canvas gusset. Expandable file wallets can help you carry large books and documents easily. Buckle& HandleThis buckle is taken from the old rotary knob version, which is more durable and convenient to use. The strong and portable handle is ideal for business trips. High QualityMade of non-toxic and environmentally friendly quality polypropylene, recyclable. Durable poly is ripstop and water resistant. Ideal for long-term storage of your important document. Wide ApplicationThese large capacity briefcase bags can provide convenient and secure storage of important project files, teaching materials, letters , stationery, class paints, memos and other office supplies, etc. They are classified and organized. Size33x24x5.5cm