Iran is about 5 times bigger than New Mexico.

New Mexico is approximately 314,310 sq km, while Iran is approximately 1,648,195 sq km, making Iran 424% larger than New Mexico. Meanwhile, the population of New Mexico is ~2.1 million people (84.7 million more people live in Iran).
Tip: This to-scale comparison of New Mexico vs. Iran uses the Mercator projection, which distorts the size of regions near the poles.