Nebraska is around the same size as Idaho.

Idaho is approximately 214,314 sq km, while Nebraska is approximately 199,099 sq km, making Nebraska 92.9% the size of Idaho. Meanwhile, the population of Idaho is ~1.6 million people (258,759 more people live in Nebraska).
Tip: This to-scale comparison of Idaho vs. Nebraska uses the Mercator projection, which distorts the size of regions near the poles.