The Pakistan Standard specifies the sizes of folders and files manufactured frcm paper or board:
───intended to receive either sheets of paper of the
A4 size (210 mm X 297 mm) or simple folders (without back) or folders or, when possible, files with a very small back:
───not forming part of any particular filing system;
───not adapted to filing cabinets of a special character:
This Pakistan Standard does not apply to box files and transfer storage cases.
PS 807-1979 history
1970PS 807-1979 SPECIFICATION FOR PAPER AND BOARD SIZES OF FOLDERS AND FILES (1ST REVISION)