West Virginia is about 1.2 times bigger than Bosnia and Herzegovina.

Bosnia and Herzegovina is approximately 51,197 sq km, while West Virginia is approximately 62,361 sq km, making West Virginia 22% larger than Bosnia and Herzegovina. Meanwhile, the population of Bosnia and Herzegovina is ~3.8 million people (2.0 million fewer people live in West Virginia).
Tip: This to-scale comparison of Bosnia and Herzegovina vs. West Virginia uses the Mercator projection, which distorts the size of regions near the poles.