Democratic Republic of the Congo is about 7 times bigger than New Mexico.

New Mexico is approximately 314,310 sq km, while Democratic Republic of the Congo is approximately 2,344,858 sq km, making Democratic Republic of the Congo 646% larger than New Mexico. Meanwhile, the population of New Mexico is ~2.1 million people (106.3 million more people live in Democratic Republic of the Congo).
Tip: This to-scale comparison of New Mexico vs. Democratic Republic of the Congo uses the Mercator projection, which distorts the size of regions near the poles.