Nebraska is about 3.9 times smaller than Turkey.

Turkey is approximately 783,562 sq km, while Nebraska is approximately 199,099 sq km, making Nebraska 25.41% the size of Turkey. Meanwhile, the population of Turkey is ~83.0 million people (81.2 million fewer people live in Nebraska).
Tip: This to-scale comparison of Turkey vs. Nebraska uses the Mercator projection, which distorts the size of regions near the poles.