Eritrea is around the same size as Louisiana.

Louisiana is approximately 112,825 sq km, while Eritrea is approximately 117,600 sq km, making Eritrea 4% larger than Louisiana. Meanwhile, the population of Louisiana is ~4.5 million people (1.7 million more people live in Eritrea).
Tip: This to-scale comparison of Louisiana vs. Eritrea uses the Mercator projection, which distorts the size of regions near the poles.