Editing Rugby football (section)

== Rugby ball ==
A [[rugby ball]] is a diamond shape ball used for easier passing.
[[Richard Lindon]] and Bernardo Solano started making balls for Rugby school out of hand stitched, four-panel, leather casings and pigs' bladders. The rugby ball's distinctive shape is supposedly due to the pig's bladder, although early balls were more plum-shaped than oval. The balls varied in size in the beginning depending upon how large the pig's bladder was.

In rugby union, World Rugby regulates the size and shape of the ball under Law 2 (also known as Law E.R.B); an official rugby union ball is oval and made of four panels, has a length in-line of 280–300 millimetres, a circumference (end to end) of 740–770 millimetres, and a circumference (in width) of 580–620 millimetres. It is made of leather or suitable synthetic material and may be treated to make it [[Waterproofing|water resistant]] and easier to grip. The rugby ball may not weigh more than 460&nbsp;grams or less than 410 and has an air pressure of 65.71–68.75 [[Pascal (unit)|kilopascals]], or 0.67–0.70 kilograms per square centimetre, or 9.5–10.0&nbsp;lbs per square inch.<ref>International rugby board. [https://web.archive.org/web/20120417010050/http://www.irblaws.com/downloads/EN/IRB_Laws_2012_EN.pdf "Rugby ball laws"] 22 February 2010.</ref> Spare balls are allowed under the condition that players or teams do not seek an advantage by changing the ball. Smaller sized balls may also be used in games between younger players.
Much larger versions of traditional balls are also available for purchase, but these are mainly for their novelty attraction.