New Mexico is about 2,710 times bigger than Jersey.

Jersey is approximately 116 sq km, while New Mexico is approximately 314,310 sq km, making New Mexico 270,857% larger than Jersey. Meanwhile, the population of Jersey is ~102,146 people (2.0 million more people live in New Mexico).
Tip: This to-scale comparison of Jersey vs. New Mexico uses the Mercator projection, which distorts the size of regions near the poles.