The standard dimensions of a basketball court, as defined by the International Basketball Federation (FIBA), are as follows:

The total size of the whole basketball court is 32m*19m。

Infield area:

Length:28 m.

Width:  49.21 feet (15 m).

Key or Paint Area: The key, also known as the paint or lane, is a rectangular area under the basket. Its dimensions are:

Length:5.8m.    wide：4.9 m.

These dimensions are standardized. However, variations may exist in non-professional or recreational settings.