Chad is 2.7 times larger than Cameroon.
Area: 475,440 km2 World Factbook
Population: 23,130,708 (July 2014) World Factbook
Cameroon, officially the Republic of Cameroon, is a country in the west Central Africa region. It is bordered by Nigeria to the west; Chad to the northeast; the Central African Republic to the east; and Equatorial Guinea, Gabon, and the Republic of the Congo to the south. Wikipedia
Area: 1,284,000 km2 World Factbook
Population: 11,412,107 (July 2014) World Factbook
Chad, officially the Republic of Chad, is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest and Niger to the west. Wikipedia