D.4 International and Japanese B Paper Sizes

These sizes are defined by ISO standards, including [ISO216:2007] and by JIS standards [JIS P0138].

Note: the Japanese B paper sizes differ from the international B paper sizes by a factor of 1.5/sqrt(2).

D.4.1 International B Paper Sizes

These sizes are defined by ISO standards, including [ISO216:2007] and by JIS standards [JIS P0138].

Table D.4: International B Paper Sizes

<TBD copy from https://www.papersizes.org/b-paper-sizes.htm>

Table D.5: Japanese B Paper Sizes

<TBD use existing table D4>

========= draft 2 ======

Implementation Remark

The following tables provide the dimensions for various ranges of named paper sizes. Each named size has dimensions

listed in multiple columns for different units (points, millimeters and inches). One of these units is normative and is

identified in the column header. The others are conversions from the normative size, shown for convenience. Since these

sizes are real numbers, comparison of media dimensions SHOULD take into account certain rounding errors. For example,Therefore

different media sizes SHOULD be considered equal when all numbers both dimensions are the same within a range of 5 points.

Note: Equivalent International and Japanese B paper sizes, i.e. ISOB0/JISB0, ISOB1/JISB1 etc, differ in area by a factor of 1.5/sqrt 2.

Each dimension therefore differs by the square root of this value, i.e. .aspect ratio. Whereas the ISO B paper sizes have an aspect ratio of 1 to sqrt(2), the JIS paper sizes have an aspect ratio of 1 to 1.5.

==== draft 2 ====

Note: Equivalent International and Japanese B paper sizes, i.e. ISOB0/JISB0, ISOB1/JISB1 etc, differ in aspect ratio. Whereas the ISO B paper sizes have an aspect ratio of , the JIS paper sizes have an aspect ratio of 1 to 1.5an area at B0 of 1*sqrt(2) m^2, the JIS paper sizes have an area of 1.5 m^2 at B0. The aspect ratios are identical..