Commonwealth of Nations
The land area of the Commonwealth nations is about , or about 21% of the total world land area. The three largest Commonwealth nations by area are Canada at , Australia at , and India at . In 2016, the Commonwealth members had a combined gross domestic product of over $9 trillion, 78% of which is accounted for by the four largest economies: United Kingdom ($2.629 trillion), India ($2.256 trillion), Canada ($1.529 trillion), and Australia ($1.258 trillion).
Commonwealth free trade
""It is proposed that a CFTA membership and expansion be conducted in four distinct phases: Phase 1 would see the creation of an initial grouping of four nations - Australia, Canada, New Zealand, and the United Kingdom. This grouping represents the most affluent and industrialized economies of the Commonwealth. Combined with stable political, judicial and social institutions, their ability to quickly integrate into a CFTA is vitally important if the organization is to have the ability to expand and succeed.""