I think that it depends on the application, but use it to carry the documents separately. The size is B4 mainly, I also use A4. Although there is nothing to hurt the document if there is more roundness and bulging on the whole, it is slightly smaller. I think that comfort is relatively good. After that it is whether or not there is durability. It might be unavoidable to use it because it uses a special usage, perhaps if it is used to put the document, but it was the best, especially if there was room for the width and the depth of the bottom.