There are four quarters in regular basketball game, and each takes 10 or 12 minutes (Ramen 67). In college basketball games, the game uses two-twenty minute halves. Extra time should take 5 minutes in all games except in high school, where it takes four minutes. Teams need to change sides after the first half of the game. A typical basketball game might take approximately 2 hours excluding the time when the game is inactive. At any given time, the court should have ten players, 5 from both sides. Despite substitutions being unrestricted, it can only be performed when the game is stopped (Wissel 51). Additionally, teams must have a uniform comprising of a jersey and a pair of shorts. For identification purposes, the jersey should have a unique number in the team printed at the front and back. In some instances, the jerseys have the names of players, sponsors and team printed on them.