Editing Squash (sport) (section)

===Ball===
[[File:Squash Ball Dunlop Revelation Pro 1.jpg|thumb|upright=0.75|A squash ball]]
Squash balls are between 39.5 and 40.5&nbsp;mm in diameter and weigh 23 to 25&nbsp;grams.<ref>{{cite web|url=http://www.squashplayer.co.uk/squash_balls.htm |title=Squash Balls |work=Squashplayer.co.uk |access-date=3 June 2009}}</ref> They are made with two pieces of rubber compound, glued together to form a hollow sphere and buffed to a matte finish. Different balls are provided for varying temperature and atmospheric conditions and standards of play: more experienced players use slow balls that have less bounce than those used by less experienced players (slower balls tend to "die" in court corners, rather than "standing up" to allow easier shots). Squash balls must be hit dozens of times to warm them up at the beginning of a session; cold squash balls have very little bounce. Small colored dots on the ball indicate its dynamic level (bounciness). 
The "double-yellow dot" ball, introduced in 2000, is the competition standard, replacing the earlier "yellow-dot" ball. There is also an "orange dot" ball for use at high altitudes. The recognized colors are:

{| class="wikitable"
! Colour !! Speed (of Play) !! Bounce !! Player Level
|-
| Orange || Extremely Slow || Super low || Only recommended for high altitude play
|-
| Double yellow || Extra Slow || Very low || Experienced
|-
| Yellow ||  Slow || Low || Advanced
|-
| Green || Medium || Average || Intermediate/Advanced
|-
| Red || Medium || High || Medium
|-
| Blue || Fast || Very high || Beginner/Junior
|}

Some ball manufacturers such as Dunlop use a different method of grading balls based on experience. They still have the equivalent dot rating but are named to help choose a ball that is appropriate for one's skill level. The four different ball types are Intro (Blue dot, 140% of Pro bounce), Progress (Red dot, 120% of Pro bounce), Competition (single yellow dot, 110% of Pro bounce) and Pro (double yellow dot).

Many squash venues mandate the use of shoes with non-marking tread and eye protection. Some associations require that all juniors and doubles players must wear eye protection. The [[National Institutes of Health]] recommends wearing goggles with polycarbonate lenses.<ref>{{cite web |url=http://www.nei.nih.gov/sports/findingprotection.asp |title=Sports, For Parents, Teachers and Coaches, National Eye Institute [NEI&#93; |publisher=Nei.nih.gov |access-date=18 April 2013 |archive-url=https://web.archive.org/web/20130427122830/http://www.nei.nih.gov/sports/findingprotection.asp |archive-date=27 April 2013 |url-status=dead }}</ref>