Friend at Court, the US Tennis Association Handbook of Tennis Rules and Regulations, defines specifications for the weight, size, rebound and deformation for four types of tennis balls.  Fast, medium, slow and high altitude types are defined.

American handball is a sport in which players use their hands to hit a small rubber ball against a wall so that it bounces off in such a way that their opponent cannot return it. As with court handball (four-wall handball), the US Handball Association governs play of the sport within the US.  One-wall handball uses the same ball as court handball and plays the same rules regarding broken balls.

Polo is a team sport played on horseback in which the objective is to score goals against an opposing team. Players score by driving a small white plastic or wooden ball into the opposing team’s goal using a long-handled mallet.  Since 1890, the US Polo Association has governed the equestrian team sport of polo played in the United States. Over time, the composition of the ball has changed. The outdoor polo ball is typically made of a high compact plastic, but was formerly made of either bamboo or willow root.

In June 2006, the US Handball Association (USHA) issuesd changes to the rules regarding broken balls.

The last complete rulebook was released by the US Handball Association in 2005. Court Handball is a competitive game in which either hand or either fist may be used to hit the ball. It is played indoors in a court similar to a raquetball court.

Handball is a team sport in which two teams of seven players each pass a ball to throw it into the goal of the other team. A standard match consists of two periods of 30 minutes, and the team that scores more goals wins. From the official Olympic website, “the modern game of handball was first played towards the end of the 19th century in Denmark, Germany and Sweden. Recognition of field handball based on the games of “Raffball” (snatch ball) and “Königsbergerball” (Konrad Koch, 1846-1911) occurred at the turn of the century. G. Wallström introduced Sweden to the sport of “handball” in 1910.

Soccer is a sport played between two teams of eleven players with a spherical ball. The game is played on a rectangular field with a goal at each end. The object of the game is to score by getting the ball into the opposing goal. The goalkeepers are the only players allowed to touch the ball with their hands or arms while it is in play and then only in their penalty area. Outfield players mostly use their feet to strike or pass the ball, but may use their head or torso to strike the ball instead. The team that scores the most goals by the end of the match wins. If the score is level at the end of the game, either a draw is declared or the game goes into extra time and/or a penalty shootout depending on the format of the competition. In soccer games governed by the National Collegiate Athletic Association (NCAA), between three and six identical balls must be furnished by the home team at the beginning of the game or the game cannot begin.  Specifications are set for the ball’s circumference, weight and pressure at the beginning of the game; however, the ball is allowed to increase in weight, within an approved range, should it get wet during play.

Women’s lacrosse is a sport played with twelve players on each team. The object of the game is to use a long-handled lacrosse stick to catch, carry, and pass a solid rubber ball in an effort to score by ultimately hurling the ball into an opponent’s goal. Defensively the object is to keep the opposing team from scoring and to dispossess them of the ball through the use of stick checking and body positioning. Equipment required to play is different from the men’s. Women are only required to wear eyewear/lacrosse goggles, and a mouth guard. Their stick has restrictions too, it has to be a certain length and the pocket cannot be too deep but the lacrosse ball sizes are the same. Colors appear to be tightly controlled in NCAA Women’s Lacrosse.  Starting in 2008, gray was added to the list of colors approved for the goalie’s uniform bottom.  Previously, the bottom portion of the uniform had to be either the team’s predominant color or black.  While it is not new in 2008, the color of the ball must be solid yellow.

The Rugby Football League (RFL) sets rules by age division for players in England. Full 13-A-Side rules are used from the age of 12 onwards.

The size and shape of the ball used at the high school level is the same as that used at the Olympic level. As defined by the National Federation of State High School Associations (NHFS), the ball must be leather or plastic.