Size of Basketball Court

To correct this problem, here's an article on basketball court sizes which looks at both the court measurements.

Length and Breadth
Let me start with the length and the breadth of the basketball court. The FIBA defines the length of the basketball court to be 91.86 ft (28 m) and the length of an NBA court is 94 ft (28.65 m). The breadth of a FIBA court is 49.21 ft (15 m) and the breadth of an NBA court is 55 ft (15.24 m).

The Basket
Both FIBA and the NBA agree that the basket should be fixed at a height of 10 ft (3.05 m) from the playing surface.

Restraining Circle
The measurements of the restraining circles from where the jump ball is taken in case of a foul to are agreed upon by both FIBA and NBA. The diameter of the restraining circle is 4 ft (1.22 m).

Center Circle
The center circle is, quite simply, the circle in the center of the court. The diameter of the center circle as per NBA rules is 12 ft (3.66 m) and as per FIBA rules is 11.81 ft (3.6 m).

Three Point Line
The three-point line is an arc on both sides of the court. If you shoot a basket from behind the three-point line, your basket will earn 3 points for the team as opposed to the 2 points your basket will get should you shoot from inside the three point arc. In NBA the three point line is located 23.75 ft (7.24 m) from the center of the basket. In FIBA, the three point line is presently 20.5 ft (6.25 m) from the center of the basket, but will be extended to 22.15 ft (6.75 m) after October 2010.

Key Area
The key area is another part of the basketball court which both the bodies of basketball do not agree on. The FIBA states that the key area, which is the shaded area on the basketball court ought to be in a trapezium shape which is 19.69 ft (6 m) long at the end-line and 11.81 ft (3.6 m) at the free throw line. The NBA court on the other hand has a rectangular key area which is 16 ft (4.88m) at both the end-line as well as the free throw line.

Free Throw Line
The free throw line, which as the name suggests is a line from behind which a free throw is taken, is 15 ft (4.57 m) from the backboard in NBA while it is 15.09 ft (4.6 m) from the backboard on a FIBA court.