Cambodia is about 2.9 times bigger than West Virginia.

West Virginia is approximately 62,361 sq km, while Cambodia is approximately 181,035 sq km, making Cambodia 190% larger than West Virginia. Meanwhile, the population of West Virginia is ~1.9 million people (14.9 million more people live in Cambodia).
Tip: This to-scale comparison of West Virginia vs. Cambodia uses the Mercator projection, which distorts the size of regions near the poles.