United States is 78 times larger than Eritrea.
Area: 117,600 km2 World Factbook
Population: 6,380,803 (July 2014) World Factbook
Eritrea, officially the State of Eritrea, is a country in the Horn of Africa. Eritrea is the Italian form of the Greek name Ἐρυθραία, meaning "red [land]". With its capital at Asmara, it is bordered by Sudan to the west, Ethiopia in the south, and Djibouti in the east. 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