This Standard specifies the sizes of the following folders and files manufactured from paper and board: 1.1 Intended to receive sheets of paper of the A4 size (210 mm ? 297 mm) or simple folders (without black) or files with a very small back. 1.2 Not forming part of any particular filing system. 1.3 Not adapted to filing cabinets of a special character. This standard does not apply to box files and transfer storage cases.