Editing Football (ball) (section)

==Association football==
{{Main|Ball (association football)}}
[[File:1998 - Tricolore (France) (4170715889).jpg|thumb|right|upright|[[Adidas Tricolore]], the official ball for the [[1998 FIFA World Cup|1998 World Cup]]]]
[[Laws of the Game (association football)|Law 2 of the game]] specifies that the ball is an air-filled [[sphere]] with a [[circumference]] of {{convert|68|-|70|cm|in|abbr=on}}, a [[Mass|weight]] of {{convert|410|-|450|g|oz|abbr=on}}, inflated to a [[pressure]] of 0.6 to 1.1&nbsp;[[technical atmosphere|atmospheres]] ({{convert|60|-|111|kPa|psi|abbr=on|disp=or}}) "at sea level", and covered in leather or "other suitable material".<ref>{{cite web|url=https://www.fifa.com/worldfootball/lawsofthegame.html |archive-url=https://web.archive.org/web/20070603165236/http://www.fifa.com/worldfootball/lawsofthegame.html |url-status=dead |archive-date=3 June 2007 |title=Laws of the Game |publisher=FIFA |access-date=30 May 2011}}</ref> The weight specified for a ball is the dry weight, as older balls often became significantly heavier in the course of a match played in wet weather. There are a number of different types of football balls depending on the match and turf including: training footballs, match footballs, professional match footballs, beach footballs, street footballs, indoor footballs, turf balls, futsal footballs and mini/skills footballs.<ref>[http://www.soccer.com/guide/soccer-ball-guide/ Soccer Balls] {{Webarchive|url=https://web.archive.org/web/20130920022136/http://www.soccer.com/guide/soccer-ball-guide/ |date=20 September 2013 }}, [http://soccer.com/ Soccer], 2013-10-14. Retrieved: 2013-10-14.</ref>

Most modern Association footballs are stitched from 32 panels of waterproofed leather or plastic: 12 regular [[pentagon]]s and 20 regular [[hexagon]]s are used because of its contrasting colors, which makes it easier for viewers to follow the movement.<ref>{{Cite web |date=2018-06-18 |title=Why do you think of that black and white design if you say "soccer ball"? |url=https://gigazine.net/gsc_news/en/20180618-classic-soccer-ball-design |access-date=2025-04-24 |website=GIGAZINE |language=en}}</ref>  The 32-panel configuration is the [[spherical polyhedron]] corresponding to the [[truncated icosahedron]]; it is spherical because the faces bulge from the pressure of the air inside. The first 32-panel ball was marketed by [[SELECT Sport A/S|Select]] in the 1950s in Denmark. This configuration became common throughout [[Continental Europe]] in the 1960s, and was publicised worldwide by the [[Adidas Telstar]], the official ball of the [[1970 FIFA World Cup|1970 World Cup]]. This design in often referenced when describing the truncated icosahedron [[Archimedean solid]], carbon [[Fullerene|buckyballs]], or the root structure of [[geodesic dome]]s. Along with its shape the material that is used to make it this ball is just as important. This material is known as polyurethane is preferred when compared to the previous one (leather) especially for durability and performance.<ref>{{Cite web |title=Soccer Ball Guide: All You Need to Know |url=https://www.soccertake.com/equipment-balls/soccer-balls-all-you-need-to-know |access-date=2025-04-24 |website=SoccerTAKE |language=en-US}}</ref>