Nevada is around the same size as Oman.

Oman is approximately 309,500 sq km, while Nevada is approximately 284,448 sq km, making Nevada 91.91% the size of Oman. Meanwhile, the population of Oman is ~3.8 million people (1.1 million fewer people live in Nevada).
Tip: This to-scale comparison of Oman vs. Nevada uses the Mercator projection, which distorts the size of regions near the poles.