Zambia is 2.7 times larger than Burkina Faso.
Area: 274,200 km2 World Factbook
Population: 18,365,123 (July 2014) World Factbook
Burkina Faso, also known by its short-form name Burkina, is a landlocked country in West Africa around 274,200 square kilometres in size. It is surrounded by six countries: Mali to the north; Niger to the east; Benin to the southeast; Togo and Ghana to the south; and Ivory Coast to the southwest. Wikipedia
Area: 752,618 km2 World Factbook
Population: 14,638,505 (July 2014) World Factbook
The Republic of Zambia is a landlocked country in Southern Africa, neighboring the Democratic Republic of the Congo to the north, Tanzania to the north-east, Malawi to the east, Mozambique, Zimbabwe, Botswana and Namibia to the south, and Angola to the west. Wikipedia