Country size comparison
compared to
Eritrea is about 13 times smaller than Mongolia.
Mongolia is approximately 1,564,116 sq km, while Eritrea is approximately 117,600 sq km, making Eritrea 7.52% the size of Mongolia. Meanwhile, the population of Mongolia is ~3.2 million people (3.0 million more people live in Eritrea).
Compare further: Eritrea vs. Mongolia