B4 Size: 38 X 27.9 CM (15 x 11 inches), Great practical zippered document cases for classification and storage, suitable for any occasion. The document bag is made of PVC thickened mesh material, waterproof and moisture-proof that the bags are very sturdy. (ATTENTION, the zipper is not waterproof) . Document pockets with zipper and rope hook design, easy to open and carry. The zip is pleasantly easy to open and close and does not jam . Translucent mesh design, you can see the contents well, although the pockets are not completely transparent. great for tidying up little things, tax documents, toys, toiletries, cosmetics, medication and much more. Class bags for business: widely used in the office to collect messy files and classify data to make work easier. For students and teachers: Heavy exam papers of various subjects, messy study papers, more order can be created with these classified storage bags.