Editing Paper size (section)

==== Indian variants ====
The ''Bureau of Indian Standards'' recommends the "ISO-A series" size of drawing sheet for engineering drawing works. The Bureau of Indian Standards specifies all the recommendations for engineering drawing sheets in its bulletin IS 10711: 2001.<ref>{{Cite book|url=https://law.resource.org/pub/in/bis/S01/is.sp.46.2003.pdf|title=SP 46 (2003): Engineering Drawing Practice for Schools and Colleges |publisher=Bureau of Indian Standards |isbn=81-7061-019-2 |date=Jul 2003 |url-status=live |archive-url=https://web.archive.org/web/20230909054902/https://law.resource.org/pub/in/bis/S01/is.sp.46.2003.pdf |archive-date= Sep 9, 2023 }}</ref>

The Bureau extended the ISO-A series with a '''Special Elongated Sizes''' (Second Choice). These sizes are achieved by increasing the shorter dimensions of a sheet of the ISO A series to lengths that are multiples of the shorter dimensions of the chosen basic sheet; in effect, all of the Indian elongated sizes emulate having several regular-size sheets joined on their long edge.

{| class="wikitable"
|+ IS Special Elongated Sizes (Second Choice) with rounded inch values
! Size !! mm × mm !! in × in !!title="aspect ratio"| AR
|-
! A3 x 3
| {{size|420|891|ar=on}} 
|-
! A3 x 4
| {{size|420|1189|ar=on}}
|-
! A4 x 3
| {{size|297|630|ar=on}}
|-
! A4 x 4
| {{size|297|841|ar=on}}
|-
! A4 x 5
| {{size|297|1051|ar=on}}
|}

There is also a '''Exceptional Elongated Sizes''' (Third Choice). These sizes are obtained by increasing the shorter dimensions of a sheet of the ISO-A series to lengths that are multiples of the shorter dimensions of the chosen basic sheet. These sizes are used when a very large or extra elongated sheet is needed.

{| class="wikitable"
|+ IS Exceptional Elongated Sizes (Third Choice) with rounded inch values
! Size !! mm × mm !! in × in !!title="aspect ratio"| AR
|-
! A0 x 2
| {{size|1189|1682|ar=2:√2}} 
|-
! A0 x 3
| {{size|1189|2523|ar=on}}
|-
! A1 x 3
| {{size|841|1783|ar=on}}
|-
! A1 x 4
| {{size|841|2378|ar=on}}
|-
! A2 x 3
| {{size|594|1261|ar=on}}
|-
! A2 x 4
| {{size|594|1682|ar=on}}
|-
! A2 x 5
| {{size|594|2102|ar=on}}
|-
! A3 x 5
| {{size|420|1486|ar=on}}
|-
! A3 x 6
| {{size|420|1783|ar=on}}
|-
! A3 x 7
| {{size|420|2080|ar=on}}
|-
! A4 x 6
| {{size|297|1261|ar=on}}
|-
! A4 x 7
| {{size|297|1471|ar=on}}
|-
! A4 x 8
| {{size|297|1682|ar=on}}
|-
! A4 x 9
| {{size|297|1892|ar=on}}
|}