Reviewing the size of a Greek chorus, I’m surprised by how many there were — 12 to 50 says wikipedia. “The chorus consisted of fifty members at the start of the 5th century B.C. It was likely Aeschylus who lowered the number to twelve, and Sophocles who raised it to fifteen. The size stayed at fifteen to the end of the 5th century B.C. Fifteen members were used by Euripides and Sophocles in tragedies.There were twenty-four members in comedies.”