The ball is round and the outer casing should be either leather, rubber or other suitable synthetic material. Its circumference should be between 75 and 78cm (29.5 and 30.25 in) and its weight between 600 and 650gm (20 and 22oz). It should be inflated to a pressure so that when it is dropped from a height of 1.8m (6ft) (measured from the floor to the bottom of the ball) on to the playing surface, it will rebound to a height of between 1.2 and 1.4m (4ft and 4ft 7in), (measured to the top of the ball).
In addition to that equip-ment already mentioned, the home team is normally responsible for providing the following: a clock, time-out watch, device for dis-playing to players and spectators how much time is left on the 30-seconds rule (see Game Guide), an official score sheet, scoreboard visible to spectators and players, markers displaying the numbers 1 to 5 for use by the scorer to indicate how many fouls a player commits, and two team-foul markers which are red and placed on the scorers table to indicate a seventh-player foul by a team.
Players of each team should wear the same outfits which must not clash with the opposing team. Each player should wear a numbered shirt and no two players in the same team should wear the same number. Players are numbered between 4 and 15. Loose-fitting shorts for mobility, and sleeveless vests are the standard attire. Basketball shoes should be rubber-soled and with protected ankle supports, although these are not necessary. Most important of all, make sure your clothing is comfortable. It is important to wear towelled socks; and it is not a bad idea to buy a pair of shoes a little too big to enable you to wear two pairs of socks which will reduce the risk of blistering.