Arkansas is about 166 times bigger than Kiribati.

Kiribati is approximately 811 sq km, while Arkansas is approximately 134,856 sq km, making Arkansas 16,528% larger than Kiribati. Meanwhile, the population of Kiribati is ~114,189 people (2.8 million more people live in Arkansas).
Tip: This to-scale comparison of Kiribati vs. Arkansas uses the Mercator projection, which distorts the size of regions near the poles.