Editing Paper size (section)

====Japanese variation<span class="anchor" id="JIS B}"></span><span class="anchor" id="Japanese B-series variant"></span>====

The Japanese standard [[Japanese Industrial Standards|JIS P 0138]] defines two main series of paper sizes. The JIS A-series is identical to the [[#ISO A|ISO A-series]] except that it has slightly different tolerances. The area of B-series paper is 1.5 times that of the corresponding A-paper (instead of the factor <math>\sqrt{2} = 1.414...</math> for the [[#ISO B|ISO B-series]]), so the length ratio is approximately 1.22 times the length of the corresponding A-series paper. The aspect ratio of the paper is the same as for the A-series paper. Both A- and B-series paper are widely available in Japan, [[Taiwan]] and China, and most photocopiers are loaded with at least A4 and either one of A3, B4, and B5 paper.

[[Cascading Style Sheets]] (CSS) only supports the most popular of the Japanese sizes, ''JIS-B4'' and ''JIS-B5''.<ref name="mozilla.org"/>

{| class="wikitable"
|+ JIS B series paper sizes (with rounded inch values)
! Size !! mm × mm || inch × inch
|-
! 0
| {{size|1030|1456}}
|-
! 1
| {{size|728|1030}}
|-
! 2
| {{size|515|728}} 
|-
! 3
| {{size|364|515}} 
|-
! 4
| {{size|257|364}} 
|-
! 5
| {{size|182|257}} 
|-
! 6
| {{size|128|182}} 
|-
! 7
| {{size|91|128}}
|-
! 8
| {{size|64|91}}
|-
! 9
| {{size|45|64}}
|-
! 10
| {{size|32|45}}
|-
! 11
| {{size|22|32}}
|-
! 12
| {{size|16|22}}
|}

{| class="wikitable"
|+ JIS P 0202 raw sizes (with rounded inch values)
! Size !! mm × mm || inch × inch ||title="aspect ratio"| AR || sun × sun
|-
!title="Between ISO RA1 and SRA1"| A ({{lang|ja|列本判}})
| {{size|625|880|ar=on}} || {{resx|20.6|29}}
|-
!title="JIS B1 oversize"| B ({{lang|ja|列本判}})
| {{size|765|1085|ar=on}} || {{resx|25.25|35.8}}
|-
! {{nihongo||四六判|Shiroku-ban}} (4-6)
| {{size|788|1091|ar=on}} || {{resx|26|36}}
|-
! {{nihongo3|Chrysanthemum|菊判|Kiku-ban}}
| {{size|636|939|ar=on}} || {{resx|21|31}}
|-
! {{nihongo||ハトロン判|Hattron}}
| {{size|900|1200|ar=on}} || {{resx|29.7|39.6}}
|}

A popular size for books, dubbed AB, combines the shorter edges of A4 and B4. Another two with an aspect ratio approximating [[16:9]] are 20% narrower variants of A6 and B6, respectively, the latter resulting from cutting JIS B1 into {{resx|4|10}} sheets (thus "B40").

There are also a number of traditional paper sizes, which are now used mostly by printers. The most common of these old series is the {{transliteration|ja|[[#K|Shiroku-ban]]}} and the {{transliteration|ja|Kiku}} paper sizes.

{| class="wikitable"
|+ Other Japanese paper sizes (with rounded inch values){{qn|date=January 2020}}
! Size
! mm × mm || inch × inch !!title="aspect ratio"| AR !! sun × sun !! Notes
|-
! AB
| {{size|210|257|ar=on}}
| {{resx|6.93|8.48}} || {{resx|A4/A5|JIS B4/B5}}
|-
! B40
| {{size|103|182|ar=16:9}} || {{resx|3.4|6}}
| JIS B1 {{resx|{{frac|height|10}}|{{frac|width|4}}}}
|-
! 35
| {{size|84|148|ar=16:9}} || {{resx|2.77|4.88}} 
| Trimmed {{resx|3|5}}<!--?-->
|-
!rowspan=4| {{transliteration|ja|Kiku-ban}}
| {{size|227|304|ar=on}} || {{resx|7.5|10}} <!--secondary variant according to Japanese Wikipedia, previously listed with 306 mm-->
|-
| {{size|218|304|ar=on}} || {{resx|7.2|10}}
|-
| {{size|152|227|ar=on}} || {{resx|5|7.5}} <!--secondary variant, previously listed with 151 mm-->
|-
| {{size|152|218|ar=on}} || {{resx|5|7.2}}
|}