Final answer:
The size of the Supreme Court is determined by the Constitution. It consists of one Chief Justice and eight associate justices, making a total of nine justices.
Step-by-step explanation:
The size of the Supreme Court is determined by the Constitution. According to the Constitution, the Supreme Court must consist of one Chief Justice and eight associate justices, making a total of nine justices. This provision is stated in Article III, Section 1 of the Constitution.
Learn more about Supreme Court size determination