This standard specifies the finished dimensions of writing paper and various printed materials. This standard applies to the finished dimensions of paper used in the fields of government, commerce, and industry, as well as business forms, catalogs, and other types of printed matter. This standard does not apply to newspapers, publications, posters, or other international standards.
JIS P 0138:1998 history
1998JIS P 0138:1998 Writing paper and certain classes of printed matter -- Trimmed sizes -- A and B series