Wyoming is about 8 times smaller than Mexico.

Mexico is approximately 1,964,375 sq km, while Wyoming is approximately 251,489 sq km, making Wyoming 12.8% the size of Mexico. Meanwhile, the population of Mexico is ~129.2 million people (128.6 million fewer people live in Wyoming).
Tip: This to-scale comparison of Mexico vs. Wyoming uses the Mercator projection, which distorts the size of regions near the poles.