New Hampshire is about 2.7 times smaller than West Virginia.

West Virginia is approximately 62,361 sq km, while New Hampshire is approximately 23,227 sq km, making New Hampshire 37.25% the size of West Virginia. Meanwhile, the population of West Virginia is ~1.9 million people (536,524 fewer people live in New Hampshire).
Tip: This to-scale comparison of West Virginia vs. New Hampshire uses the Mercator projection, which distorts the size of regions near the poles.