Editing Paper size (section)

==={{lang|de|Weltformat}}===

The {{lang|de|Weltformat}} ('world format') was developed by German chemist [[Wilhelm Ostwald]] in 1911 as part of [[Die Brücke (institute)|Die Brücke]], around the same time DIN 476 was first discussed. It shares the same design primitives, especially the aspect ratio, but is based upon 1 cm as the short edge of the smallest size. Sizes were designated by roman numerals. The result, for the fourth through fourteenth size, is close to the DIN/ISO C series.<ref>{{cite news|author=Wilhelm Ostwald|title=Die Weltformate: I. Für Drucksachen|url=https://archive.org/details/DieWeltformate|publisher=Seybold|location=Ansbach|oclc=255038683|newspaper=[[Börsenblatt für den Deutschen Buchhandel]]|date=18 October 1911|issue=243|page= 12330}}</ref><ref>{{cite book|author=Karl Wilhelm Bührer|title=Raumnot und Weltformat: Schriften über Die Brücke|volume=Band 2|publisher=Seybold|location=München / Ansbach |year=1912|oclc=253384402}}</ref>

{| class="wikitable" 
|+ Original world format sizes with equivalent C-series format
|-
! {{lang|de|Weltformat}} 
! mm × mm !! inch × inch 
! DIN 
|-
|I ||{{size|10|14|p=8}}|| 
|-
|II ||{{size|14|20|p=8}}|| 
|-
|III ||{{size|20|28|p=8}}|| 
|-
|IV ||{{size|28|40|p=8}}|| C10
|- 
|V ||{{size|40|57|p=8}}|| C9
|- 
|VI ||{{size|57|80|p=8}}|| C8
|- 
|VII ||{{size|80|113|p=8}}|| C7
|-
|VIII ||{{size|113|160|p=8}}|| C6
|-
|IX ||{{size|160|226|p=8}}|| C5
|-
|X ||{{size|226|320|p=8}}|| C4
|-
|XI||{{size|320|453|p=8}}|| C3
|- 
|XII ||{{size|453|640|p=8}}|| C2
|-
|XIII ||{{size|640|905|p=8}}|| C1
|- style="font-weight: bolder"|
|XIV ||{{size|905|1280|p=8}}|| C0
|-
|XV ||{{size|1280|1810|p=8}}|| 
|-
|XVI ||{{size|1810|2560|p=8}}|| 
|}

The sizes have been used for some print products in the early 20th century in central Europe but got replaced by DIN sizes almost entirely. However, it was successfully adopted from 1913 onwards for posters and placards in Switzerland. Even today, the default size for posters in Swiss advertisements, F4, is colloquially known as {{lang|de|Weltformat}}, although it measures 895 mm × 1280 mm, i.e. 1 cm less than size XIV.<ref name="APG">[https://www.apgsga.ch/en/templates-and-specifications/ APG|SGA: Templates and specifications]</ref> This poster size goes alongside F12 {{lang|de|Breitformat}} 2685 mm × 1280 mm (3 × F4) and F24 {{lang|de|Großformat}} 2685 mm × 2560 mm (2 × 3 × F4), as well as F200 "Cityformat" 1165 mm × 1700 mm.