Editing Paper size (section)

====Standardized American paper sizes<span class="anchor" id="ANSI paper sizes"></span><span class="anchor" id="ANSI"></span>====
[[File:ANSI size illustration2.svg|thumb|right|A size chart illustrating the ANSI sizes, superimposed on an "ANSI E" sheet]]

In 1996<!-- https://sizes.com/materials/paperUStech.htm claims that it was withdrawn in 1995!-->, the [[American National Standards Institute]] adopted [[ANSI/ASME Y14.1]] which defined a regular series of paper sizes based upon the ''de facto'' standard {{cvt|8+1/2|×|11|inch|mm|sigfig=3}} Letter size which it assigned "ANSI A", intended for technical drawings, hence sometimes labeled "Engineering". This series is somewhat similar to the ISO standard in that cutting a sheet in half would produce two sheets of the next smaller size and therefore also includes Ledger/Tabloid<ref name="PPD">{{cite web  |author=Adobe Systems Incorporated |author-link=Adobe Systems |date=9 February 1996 |title=PostScript Printer Description File Format Specification |edition=4.3 |location=[[San Jose, California]] |page=191 |url=http://partners.adobe.com/public/developer/en/ps/5003.PPD_Spec_v4.3.pdf |access-date=6 March 2008 |url-status=dead |archive-url=https://web.archive.org/web/20080723180944/http://partners.adobe.com/public/developer/en/ps/5003.PPD_Spec_v4.3.pdf |archive-date=23 July 2008}}{{better source|date=July 2016}}</ref> as "ANSI B". Unlike the ISO standard, however, the arbitrary base sides forces this series to have two alternating aspect ratios. For example, ANSI A is less elongated than A4, while ANSI B is more elongated than A3.

The Canadian standard CAN2 9.60-M76 and its successor CAN/CGSB 9.60-94 "Paper Sizes for Correspondence" specified paper sizes P1 through P6, which are the U.S. paper sizes rounded to the nearest 5&nbsp;mm.<ref>{{cite web |url=http://www.cl.cam.ac.uk/~mgk25/iso-paper.html |title=International standard paper sizes |access-date=6 March 2008 |author-last=Kuhn |author-first=Markus |archive-url=https://web.archive.org/web/20080115144056/http://www.cl.cam.ac.uk/~mgk25/iso-paper.html |archive-date=15 January 2008 |url-status=live}}</ref> All custom Canadian paper size standards were withdrawn in 2012.<ref name="CAN"><!-- The bare URLs below need placing in some kind of template -->
{| class="wikitable"
|+ Canadian custom paper size standards 
! Number !! Title !! Original CAN2 release !! CAN/CGSB replacement !! Withdrawal
|-
| 9.60 || Paper Sizes for Correspondence || [http://www.scc.ca/en/standardsdb/standards/2700 1976-04] || [http://www.scc.ca/en/standardsdb/standards/5790 1994-07] ||rowspan=4| 2012-04
|-
| 9.61 || Paper Sizes for Printing || [http://www.scc.ca/en/standardsdb/standards/2701 1976-04] || [http://www.scc.ca/en/standardsdb/standards/5789 1994-07]
|-
| 9.62 || Paper Sizes for Single Part Continuous Business Forms || [http://www.scc.ca/en/standardsdb/standards/2417 1981-12] || [http://www.scc.ca/en/standardsdb/standards/5788 1994-07]
|-
| 9.64 || Drawing Sheet Sizes || [http://www.scc.ca/en/standardsdb/standards/2512 1979-04] || [http://www.scc.ca/en/standardsdb/standards/5786 1994-07]
|-
| 200.2 || Common Image Area for Paper Sizes P4 and A4 || [http://www.scc.ca/en/standardsdb/standards/2464 1979-04] || || 2012-03
|}
</ref>

With care, documents can be prepared so that the text and images fit on either ANSI or their equivalent ISO sheets at a 1:1 reproduction scale.

{| class="wikitable"
|+ ANSI and CAN paper sizes
|-
! US size
! inch × inch !! mm × mm !!title="aspect ratio"| AR !!colspan=2| Canadian size (mm × mm) !!colspan=2| Similar size (mm × mm)
|-
| colspan=4 {{n/a}} || CAN P6 || 107 × 140 || ISO A6 || 105 × 148
|- title="Memo, Statement"
| colspan=4 {{n/a}} || CAN P5 || 140 × 215 || ISO A5 || 148 × 210
|- title="Letter"
! ANSI A
|  {{frac|8|1|2}} × 11 || 216 × 279 || 17:22 || CAN P4 || 215 × 280 || ISO A4 || 210 × 297
|- title="Ledger, Tabloid"
! ANSI B
| 11 × 17 || 279 × 432 || 11:17 || CAN P3 || 280 × 430 || ISO A3 || 297 × 420
|-
! ANSI C
| 17 × 22 || 432 × 559 || 17:22 || CAN P2 || 430 × 560 || ISO A2 || 420 × 594
|-
! ANSI D
| 22 × 34 || 559 × 864 || 11:17 || CAN P1 || 560 × 860 || ISO A1 || 594 × 841
|-
! ANSI E
| 34 × 44 || 864 × 1118 || 17:22 || colspan=2 {{n/a}} || ISO A0 || 841 × 1187
|}

Other, informal, larger sizes continuing the alphabetic series illustrated above exist, but they are not part of the series ''per se'', because they do not exhibit the same aspect ratios. For example, Engineering F size is {{cvt|28|×|40|inch|mm|0|disp=or}} with approximately 1.4286:1; it is commonly required for [[Naval Facilities Engineering Command|NAVFAC]] drawings, but is generally less commonly used. Engineering G size is {{cvt|22+1/2|inch|mm|0}} high, but it is a roll format with a variable width up to {{cvt|90|inch|m}} in increments of {{cvt|8+1/2|inch|mm|0}}. Engineering H through N sizes are also roll formats.

Such huge sheets were at one time used for full-scale layouts of aircraft parts, automotive parts, wiring harnesses, and the like, but are slowly being phased out, due to widespread use of [[computer-aided design]] (CAD) and [[computer-aided manufacturing]] (CAM). Some visual arts fields also continue to use these paper formats for large-scale printouts, such as for displaying digitally painted character renderings at life-size as references for makeup artists and costume designers or to provide an immersive landscape reference.