New Jersey is about 4.7 times smaller than Jordan.

Jordan is approximately 89,342 sq km, while New Jersey is approximately 19,211 sq km, making New Jersey 21.5% the size of Jordan. Meanwhile, the population of Jordan is ~11.0 million people (2.2 million fewer people live in New Jersey).
Tip: This to-scale comparison of Jordan vs. New Jersey uses the Mercator projection, which distorts the size of regions near the poles.