Nebraska is about 2.5 times bigger than Maine.

Maine is approximately 79,931 sq km, while Nebraska is approximately 199,099 sq km, making Nebraska 149% larger than Maine. Meanwhile, the population of Maine is ~1.3 million people (497,980 more people live in Nebraska).
Tip: This to-scale comparison of Maine vs. Nebraska uses the Mercator projection, which distorts the size of regions near the poles.