Cambodia is about 1.4 times smaller than Wyoming.

Wyoming is approximately 251,489 sq km, while Cambodia is approximately 181,035 sq km, making Cambodia 71.99% the size of Wyoming. Meanwhile, the population of Wyoming is ~563,626 people (16.1 million more people live in Cambodia).
Tip: This to-scale comparison of Wyoming vs. Cambodia uses the Mercator projection, which distorts the size of regions near the poles.