Editing System of units of measurement (section)

===Area===
* The [[American football#Field and players|American football field]], which has a playing area {{convert|100|yd|m|1|lk=in}} long by {{convert|160|ft|m|1}} wide. This is often used by the [[United States|American]] public media for the sizes of large buildings or parks. It is used both as a unit of length ({{convert|100|yd|m|1|abbr=on|disp=or}}, the length of the playing field excluding goal areas) and as a unit of area ({{convert|57600|sqft|m2|abbr=on|disp=or}}), about {{convert|1.32|acre|ha|lk=on}}.
* British media also frequently uses the [[Association football pitch|football pitch]] for equivalent purposes, although [[soccer]] pitches are not of a fixed size, but instead can vary within defined limits ({{convert|100|-|130|yd|m|1|abbr=on|disp=or}} long, and {{convert|50|-|100|yd|m|1|abbr=on|disp=or}} wide, giving an area of {{convert|5000|to|13000|sqyd|m2|0|abbr=on|disp=or}}). However the [[UEFA Champions League]] field must be exactly {{convert|105|by|68|m|yd|2|abbr=on}} giving an area of {{convert|7140|m2|ha|abbr=on}} or {{convert|8539|sqyd|acre|abbr=on|lk=on}}. For example, "[[High-speed Sea Service|HSS vessels]] are aluminium catamarans '''about the size of a football pitch'''."<ref>{{Cite web|last=Henry|first=Lesley-Anne|date=23 June 2007|title=Sad sight of a superferry laid up due to soaring jet fuel bills|url=http://www.belfasttelegraph.co.uk/news/local-national/article2698634.ece|url-status=dead|archive-url=https://web.archive.org/web/20081006162911/http://www.belfasttelegraph.co.uk/news/local-national/article2698634.ece|archive-date=2008-10-06|website=The [[Belfast Telegraph]]}}</ref>
* Larger areas are also expressed as a multiple of the areas of states and countries understood to be familiar to the reader.