West Virginia is about 15 times smaller than Tanzania.

Tanzania is approximately 947,300 sq km, while West Virginia is approximately 62,361 sq km, making West Virginia 6.58% the size of Tanzania. Meanwhile, the population of Tanzania is ~63.9 million people (62.0 million fewer people live in West Virginia).
Tip: This to-scale comparison of Tanzania vs. West Virginia uses the Mercator projection, which distorts the size of regions near the poles.