Pennsylvania is around the same size as Eritrea.

Eritrea is approximately 117,600 sq km, while Pennsylvania is approximately 116,075 sq km, making Pennsylvania 98.7% the size of Eritrea. Meanwhile, the population of Eritrea is ~6.2 million people (6.5 million more people live in Pennsylvania).
Tip: This to-scale comparison of Eritrea vs. Pennsylvania uses the Mercator projection, which distorts the size of regions near the poles.