New Mexico is about 6 times smaller than Sudan.

Sudan is approximately 1,861,484 sq km, while New Mexico is approximately 314,310 sq km, making New Mexico 16.88% the size of Sudan. Meanwhile, the population of Sudan is ~48.0 million people (45.9 million fewer people live in New Mexico).
Tip: This to-scale comparison of Sudan vs. New Mexico uses the Mercator projection, which distorts the size of regions near the poles.