The size of the Court is not specified; the Constitution leaves it to Congress to set the number of justices. Under the Judiciary Act of 1789 Congress originally fixed the number of justices at six (one chief justice and five associate justices).
The Court's size is unspecified; the Constitution entrusts Congress to determine the number of justices. According to the Judiciary Act of 1789, Congress initially set the number at six (one chief justice and five associate justices).