Turkey is about 3.9 times bigger than Nebraska.

Nebraska is approximately 199,099 sq km, while Turkey is approximately 783,562 sq km, making Turkey 294% larger than Nebraska. Meanwhile, the population of Nebraska is ~1.8 million people (81.2 million more people live in Turkey).
Tip: This to-scale comparison of Nebraska vs. Turkey uses the Mercator projection, which distorts the size of regions near the poles.