The standard size of a basketball in the NBA is 9.5 to 9.85 inches (24.1 to 25.0 cm) in diameter.
Court Size Overall: The overall size of a High School Basketball court is typically 84 feet long and 50 feet wide. Some Junior High School court will measure 74 feet long and 42 feet wide. The Foul Line: For all courts the “foul line” distance is 15 feet from the foul line to the front of the backboard. Print this diagram(PDF). Basketball court dimensions vary in overall length and width. In many areas of the country, older high school gymnasiums in particular have smaller overall size and layout than regulation. Many of these same gyms have varying backboard designs and measurements. The standard size of an NBA court is 94' long by 50' wide. There is  no standard size for the actual gym. As long as there is a  reasonably safe amount of space on all sides … of the court, the gym  can be considered meeting minimum standards. It weighs 22 ounces. Those are basically the standard measurements of a basketball. If your curious about the basket … ball rim, it is 18 inches wide(interior). His first rules allowed teams to have up to 40 players on the court! Can you imagine? Nowadays, the standard basketball court dimensions are a rectangle 94 feet by 50 feet; however, high school basketball courts are a bit shorter, and the courts for junior high and youth leagues are even smaller. The following table provides youth league, junior high, and high school basketball court dimensions:  The standard size of an NBA court is 94' long by 50' wide. There is  no standard size for the actual gym. As long as there is a  reasonably safe amount of space on all sides … of the court, the gym  can be considered meeting minimum standards. The standard NBA Court is 94 feet by 50 feet. A lot fo High Schools and Colleges built them 84 feet by 50 feet The 'lost' 10' (ten feet) is removed as 5' from either side of the centre line All dimensions remain the same however the radius of the 3 point line changes NBA 23'-9. Basketballs typically range in size from very small promotional items only a few inches in diameter to extra large balls nearly a foot in diameter used in training exercises to increase the skill of players. The standard size of a basketball in the NBA is 9.5 to 9.85 inches (24.1 to 25.0 cm) in diameter.  Basketball Court Dimensions. Basketball court dimensions are as follows: #1 NBA/NCAA-regulation basketball court dimension is 94' long by 50' wide. #2 High School basketball court dimension measure 84' long by 50' wide. #3 Jr. High School basketball court dimension measure 74' long and 42' wide. Click here for a diagram layout of basketball court dimensions.  The regulation distance from the ground to the top of the rim is 10 feet for all levels of play. Regulation backboards are 6 feet wide (72 inches) by 42 inches tall. All basketball rims (hoops) are 18 inches in diameter. The inner square on the backboard is 24 inches wide by 18 inches tall. All line markings on the floor are 2 inches wide and can vary in color. Basketball courts come in different sizes and colors. In the NBA, the court is 94 feet (29 m) by 50 feet (15 m). Under International Basketball Federation (FIBA) rules, the court is minutely smaller, measuring exactly 28 metres (92 ft) by 15 metres (49 ft). A high school court is slightly smaller, at 84 feet (26 m) by 50 feet (15 m). In amateur basketball, court sizes vary widely. The baskets are always 10 feet (3.0 m) above the floor (except possibly in youth competition).
http://www.sportsknowhow.com/basketball/dimensions/high-school-basketball-court-dimensions.html http://www.answers.com/Q/What_is_the_standard_size_of_an_NBA_basketball http://www.my-youth-basketball-player.com/basketball-court-dimensions.html http://www.answers.com/Q/Standard_size_of_basketball_court https://en.wikipedia.org/wiki/Basketball_(ball) https://www.basketball-goals.com/basketball%20court%20dimensions.htm http://www.sportsknowhow.com/basketball/dimensions/basketball-court-dimensions-diagram.html https://en.wikipedia.org/wiki/Basketball_court
standard basketball size