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

New Mexico is approximately 314,310 sq km, while Jersey is approximately 116 sq km, making Jersey 0.04% the size of New Mexico. Meanwhile, the population of New Mexico is ~2.1 million people (2.0 million fewer people live in Jersey).
Tip: This to-scale comparison of New Mexico vs. Jersey uses the Mercator projection, which distorts the size of regions near the poles.