Country size comparison
compared to
Mongolia is about 13 times bigger than Eritrea.
Eritrea is approximately 117,600 sq km, while Mongolia is approximately 1,564,116 sq km, making Mongolia 1,230% larger than Eritrea. Meanwhile, the population of Eritrea is ~6.2 million people (3.0 million fewer people live in Mongolia).
Compare further: Mongolia vs. Eritrea