New Jersey is about 57 times smaller than Ethiopia.

Ethiopia is approximately 1,104,300 sq km, while New Jersey is approximately 19,211 sq km, making New Jersey 1.74% the size of Ethiopia. Meanwhile, the population of Ethiopia is ~113.7 million people (104.9 million fewer people live in New Jersey).
Tip: This to-scale comparison of Ethiopia vs. New Jersey uses the Mercator projection, which distorts the size of regions near the poles.