Original sentence: Big Five law firms (South Africa).Big Four (audit firms).Big Six law firms.Red Circle (law).Seven Sisters (law firms).Silver Circle.White shoe firm
Edited sentence: Big Five, referring to the five largest South African law firms.Big Four, the four largest accountancy and professional services firms in the world.Big Six, referring to six Australian law firms perceived to be of the top tier.Red Circle, referring to leading firms in China.Seven Sisters, referring to the seven Canadian law firms considered to be the top tier.Silver Circle, referring to other elite English law firms considered to be outside the Magic Circle.White shoe firms or Charmed Circle, referring to law firms perceived to be the leading New York City law firms