Arkansas is about 16 times smaller than Saudi Arabia.

Saudi Arabia is approximately 2,149,690 sq km, while Arkansas is approximately 134,856 sq km, making Arkansas 6.27% the size of Saudi Arabia. Meanwhile, the population of Saudi Arabia is ~35.4 million people (32.4 million fewer people live in Arkansas).
Tip: This to-scale comparison of Saudi Arabia vs. Arkansas uses the Mercator projection, which distorts the size of regions near the poles.