United States is 7.4 times larger than Mali.
Area: 1,240,192 km2 World Factbook
Population: 16,455,903 (July 2014) World Factbook
Mali, officially the Republic of Mali, is a landlocked country in West Africa. Mali is bordered by Algeria to the north, Niger to the east, Burkina Faso and Ivory Coast to the south, Guinea to the south-west, and Senegal and Mauritania to the west. Wikipedia
The United States of America, commonly referred to as the United States, America, and sometimes the States, is a federal republic consisting of 50 states and a federal district. The 48 contiguous states and Washington, D.C., are in central North America between Canada and Mexico. Wikipedia