Editing Paper size (section)

== Business card sizes ==
{{main|Business card#Dimensions}}

{| class="wikitable sortable"
|+ Common business card sizes
! Origin
! mm × mm !! inch × inch  !!title="aspect ratio"| AR
|-
! A8
| 74 × 52 || {{frac|2|15|16}} × {{frac|2|1|16}} || {{sort|1.423|√2}}
|- title="envelope?"
! B8
| 88 × 62 || {{frac|3|4|9}} × {{frac|2|4|9}} || {{sort|1.419|√2}}
|- style="display:none"
! C8
| 81 × 57 || {{frac|3|3|16}} × {{frac|2|1|4}} || {{sort|1.421|√2}}
|- style="display:none"
! Iranian
| 85 × 48 || {{frac|3|1|3}} × {{frac|1|8|9}} || 1.771
|-
! Western Europe
| 85 × 55 || {{frac|3|1|3}} × {{frac|2|1|6}} || {{ratio|17|11}}
|-
! International
| 86 × 54 <!-- ISO/IEC 7810 ID-1 is exactly 53.98 mm × 85.6 mm, but business cards only approximate this size -->|| {{frac|3|3|8}} × {{frac|2|1|8}} || {{ratio|27|17}}
|-
! North America
| 89 × 51 || {{frac|3|1|2}} × 2<!--only inch-based size--> || {{ratio|7|4}}
|-
! Eastern Europe, Asia, Africa, South America
| 90 × 50 || {{frac|3|9|16}} × 2 || {{ratio|9|5}}
|-
! East Asia
| 90 × 54 || {{frac|3|9|16}} × {{frac|2|1|8}} || {{ratio|5|3}}
|-
! Scandinavia, Southeast Asia, Oceania
| 90 × 55 || {{frac|3|9|16}} × {{frac|2|1|6}} || {{ratio|18|11}}
|-
! Japan
| 91 × 55 || {{frac|3|7|12}} × {{frac|2|1|6}} || 1.6{{overline|54}}
|}

The international business card has the size of the smallest rectangle containing a credit card rounded to full millimetres, but in Western Europe, it is rounded to half centimetres (rounded up in Northern Europe), in Eastern Europe to full centimetres, in North America to half inches. However, ''credit card size'', as defined in [[ISO/IEC 7810]], also specifies rounded corners and thickness.