Basketball ( ball ) - wikipedia Basketball ( ball ) A typical basketball A basketball ( basketball ball ) is a spherical ball used in basketball games. 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. For example, a youth basketball could be 27 inches ( 69 cm ) in circumference, while an National Collegiate Athletic Association ( NCAA ) men 's ball would be a maximum of 30 inches ( 76 cm ) and an NCAA women 's ball would be a maximum of 29 inches ( 74 cm ). The standard for a basketball in the National Basketball Association ( NBA ) is 29.5 inches ( 75 cm ) in circumference and for the Women 's National Basketball Association ( WNBA ), a maximum circumference of 29 inches ( 74 cm ). High school and junior leagues normally use NCAA, NBA or WNBA sized balls. Aside from the court and the baskets, the basketball is the only piece of equipment necessary to play the game of basketball. During the game, the ball must be bounced continuously ( dribbling ), thrown through the air to other players ( passing ) and towards the basket ( shooting ). Therefore, the ball must be very durable and easy to hold on to. The ball is also used to perform tricks ( sometimes called freestyling ), the most common of which are spinning the ball on the tip of one 's middle finger, dribbling in complex patterns, rolling the ball over one 's shoulder, or performing aerobatic maneuvers with the ball while executing a slam dunk, most notably in the context of a slam dunk contest. Contents 1 Characteristics 2 Sizes 3 History 4 Notable basketball manufacturers 5 See also 6 References Characteristics Nearly all basketballs have an inflatable inner rubber bladder, generally wrapped in layers of fiber and then covered with a surface made either from leather ( traditional ), rubber, or a synthetic composite. As in most inflatable balls, there is a small opening that allows the pressure to be increased or decreased. The surface of the ball is nearly always divided by `` ribs '' that are recessed below the surface of the ball in a variety of configurations and are generally a contrasting color. A brownish orange surface with black ribs and a possible logo is the traditional color scheme of basketballs but they are sold in various colors. Balls are generally designated for indoor ( generally made of leather or absorbent composites ), or all - surface use ( generally made of rubber or durable composites, also known as indoor / outdoor balls ). Indoor balls tend to be considerably more expensive than all - surface balls due to cost of materials. In addition, brand new all - leather indoor balls must be `` broken in '' first to achieve optimal grip before use in competition. The abrasiveness of asphalt and the dirt and moisture present in an outdoor setting will usually ruin an indoor ball within a very short period of time, which is why an indoor / outdoor ball is recommended for recreational players. Outdoor balls are commonly made from rubber to cope with rougher conditions, and they need to be filled with more air to retain a suitable level of air pressure in colder weather. Sizes Different sizes are used for different age groups. The common standards are : Size Type Circumference Weight Notes on basketball 7 Men 29.5 in ( 75 cm ) ( 749 -- 780 mm 29.5 -- 30.7 in ) 22 oz ( 620 g ) ( 567 -- 650 g 20 -- 23 oz ) Men and boys ages 15 and up. This is the official size for men 's high school, college, and professional. 6 Women 28.5 in ( 72 cm ) ( 724 -- 737 mm 28.5 -- 29.0 in ) 20 oz ( 570 g ) ( 510 -- 567 g 18 -- 20 oz ) Boys ages 12 - 14. Women and girls ages 12 and up. This is the official size for women 's high school, college, and professional. 5 Youth ( North America ) Mini ( FIBA ) 27.5 in ( 70 cm ) ( 690 -- 710 mm 27.2 -- 28.0 in ) 17 oz ( 480 g ) ( 470 -- 500 g 17 -- 18 oz ) Boys and girls ages 9 - 11 years old. This is the standard youth basketball. Youth ( North America ) 25.5 in ( 65 cm ) 14 oz ( 400 g ) Boys and girls ages 5 - 8 years old. Mini ( North America ) 22.0 in ( 56 cm ) 10 oz ( 280 g ) Boys and girls ages 4 - 8 years old. Also known as `` mini '' basketball. Note that the ball used for all competitions ( men 's, women 's, and mixed ) in the formalized halfcourt game of 3x3 combines characteristics of the size 6 and size 7 balls. Its circumference is that of a size 6 ball, but its weight is that of a size 7. History A historic basketball. In early December 1891, the chairman of the physical education department at the School for Christian Workers ( now Springfield College ) in Springfield, Massachusetts, instructed physical education teacher James Naismith, known to many as the inventor of basketball, to invent a new game to entertain the school 's athletes in the winter season. Naismith assembled his class of 18 young men, appointed captains of two nine - player teams, and set in motion the first ever basketball game, played with a soccer ball and two peach baskets tacked to either end of the gymnasium. The first purpose - built basketballs were made from panels of leather stitched together with a rubber bladder inside. A cloth lining was added to the leather for support and uniformity ( identity ). A molded version of the early basketball was invented in 1942. For many years, leather was the material of choice for basketball coverings, however in the late 1990s, composite materials, like synthetics were put forth and have rapidly gained acceptance in most leagues due to their superior performance in harsh outdoor game conditions. From 1967 through 1976, the American Basketball Association ( ABA ) used a distinctive red, white and blue basketball that is still seen from time to time. Notable basketball manufacturers Spalding Spalding was the first company to produce a basketball for official use. Company founder A.G. Spalding made the first dedicated basketball in the last years of the 19th century at the behest of James Naismith. It has produced basketballs since that time and has produced the NBA 's official game ball since 1983. They also produce the balls for the WNBA and NBA Development League. The company also produces a wide variety of balls for the consumer market. In 2012, it also became official provider for both the Euroleague and Eurocup competitions. It also serves as provider for Liga ACB. Spalding became the new supplier for NBL Australia in 2010. Molten Molten, a Japanese sporting goods manufacturer, has the current contract to provide game balls for : All International Basketball Federation ( FIBA ) world championships and continental qualifying events. All FIBA Asia events. The VTB United League. Many domestic leagues, including NBL Australia, Argentina, Uruguay, British Basketball League, France ( women ), Greece, Indonesia, Italy, Lithuania, the Philippines, Poland ( women 's ), and Portugal. Until the 2006 -- 07 season, it had provided balls for both Europe - wide competitions organized by Euroleague Basketball, the Euroleague and ULEB Cup ( now the Eurocup ). Molten 's top - of - the line product is the GL7, a leather ball with a distinctive 12 - panel design. Wilson Wilson Sporting Goods is the official ball supplier of all NCAA postseason tournaments, most notably the men 's and women 's Division I tournaments, and is used by many NCAA teams during the season as well by many high school leagues. As of 2015, Wilson also supplies balls for all FIBA - operated 3x3 competitions. Like Spalding, Wilson produces a variety of balls for the consumer market as well. Rawlings Rawlings has manufactured basketballs since 1902. The company is known for producing a 10 - panel ball ( known as the TEN ), along with traditional 8 - panel balls. The TEN basketball is the official ball of the Amateur Athletic Union and the `` Gus Macker '', the largest 3 - on - 3 basketball tournament in the United States. Nike Nike had the contract to produce balls for the Euroleague Basketball Company ( including the Euroleague and the Eurocup ) from 2007 until 2012, when it turned to Spalding. In the Philippines the NCAA and UAAP use the Nike 4005 Official Tournament Balls. Nivia Nivia is India 's first sports equipment manufacturer produces hand made basketballs. Nivia was one of the official partners of 2015 National Games of India for basketball. Former sponsored for Indian College basketball league & Indian school of basketball league. Nivia Sports makes 1 ball in every 3 seconds, all balls are assured with quality test by shooting them at the speed of 25 mph at an iron plate of thickness of 1 inch for 2000 times before sending them to leagues. Others Include : Adidas, Avaro, Baden ( official Harlem Globetrotters supplier ), Dunlop, DHS, Kipsta, Mikasa, Mitre, Sterling Athletics... See also List of inflatable manufactured goods References Wikimedia Commons has media related to Basketball balls. Look up basketball in Wiktionary, the free dictionary. Jump up ^ Zirm, Jordan. `` Basketball Sizes : A Quick Guide for All Levels of Play ''. STACK. Retrieved 2017 - 05 - 05. Jump up ^ Putman, Carl ( September 11, 2017 ). `` Basketball Official Size & Weight ''. LiveStrong.com. Retrieved 2018 - 02 - 02. Jump up ^ `` Sports Gear Lab ''. Sportsgearlab.com. Retrieved 31 May 2016. ^ Jump up to : `` Basketball Size Chart - Recommended Sizes for Mom & Me ''. www.breakthroughbasketball.com. Retrieved 2017 - 05 - 05. ^ Jump up to : `` Rule 7 : Basketballs '' ( PDF ). Official Basketball Rules 2017 : Basketball Equipment. FIBA. 4 July 2017. pp. 11 -- 12. Retrieved 30 September 2017. ^ Jump up to : `` Wilson to provide the Official Game Ball for FIBA '' ( Press release ). Amer Sports. 9 June 2015. Retrieved 17 August 2015. Jump up ^ Spalding becomes global provider for Euroleague Basketball Jump up ^ `` Basketball Australia to Play Ball with Spalding Through to 2019 ''. Basketball Australia. August 10, 2016. Retrieved 2018 - 02 - 02. Jump up ^ `` GL7 ''. Archived from the original on April 19, 2007. Jump up ^ `` Euroleague Basketball Announces Partnership with Nike ''. Euroleague Basketball. 2007 - 06 - 28. Archived from the original on 1 July 2007. Retrieved 2007 - 07 - 02. Jump up ^ `` Watch a blob of rubber turn into a basketball ''. CNN. hide Basketball ( outline ) General topics History of basketball James Naismith Variations of basketball Leagues Statistics Glossary of terms Index of articles Rules Bonus Jump ball Officials Turnover Violation 3 seconds Offense Defense 5 seconds Basket interference Carrying Double dribble Goaltending Shot clock Traveling Foul Flagrant Personal Technical Game play Air ball Alley - oop Assist Backboard shattering Ball hog Block Buzzer beater Cherry picking Dribble Crossover Dunk Euro step Fadeaway Fast break Fly Flop Jump shot Layup Finger roll Field goal Four - point play Free throw Hook shot Moves Pick and roll Positions Posterized Playbook Rebound Point Screen Back screen Slashing Steal Three - pointer Three - point play Uncontested shot Strategy General Sixth man Offense Continuity offense Flex Shuffle UCLA High Post Wheel Dribble drive motion Four corners Motion Princeton Run and gun Grinnell System Nellie Ball Small ball Triangle Defense 1 - 2 - 1 - 1 1 -- 3 -- 1 2 -- 3 zone Amoeba Box - and - one Double team Full - court press Hack - a-Shaq Jordan Rules Line Man - to - man Match - up zone Triangle - and - two Zone Equipment Backboard Ball Breakaway rim Court Half court Key Net Possession arrow Whistle Clothing Basketball sleeve Finger sleeve Air Jordan Chuck Taylor All - Stars Miscellaneous 100 - point scorers 50 -- 40 -- 90 club AAU All - Americans AAU champions Mikan Drill Player tracking Shootaround Tip drill Winning streaks Retrieved from `` https://en.wikipedia.org/w/index.php?title=Basketball_(ball)&oldid=843860578 '' Categories : Balls Basketball equipment Inflatable manufactured goods Hidden categories : All articles with dead external links Articles with dead external links from February 2018 All articles with unsourced statements Articles with unsourced statements from February 2018 Talk Contents About Wikipedia Azərbaycanca Bosanski Català Dansk Deutsch Ελληνικά Español فارسی Français 한국어 Հայերեն Italiano Latina Lëtzebuergesch 日本 語 Polski Português Română Русский Српски / srpski Suomi Svenska Українська 中文 15 more Edit links This page was last edited on 31 May 2018, at 23 : 26 ( UTC ). 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Question: what type of basketball does the nba use
Answer: 29.5 inches (75 cm) in circumference