Arkansas is about 2,869 times bigger than Pitcairn Islands.

Pitcairn Islands is approximately 47 sq km, while Arkansas is approximately 134,856 sq km, making Arkansas 286,828% larger than Pitcairn Islands. Meanwhile, the population of Pitcairn Islands is ~50 people (2.9 million more people live in Arkansas).
Tip: This to-scale comparison of Pitcairn Islands vs. Arkansas uses the Mercator projection, which distorts the size of regions near the poles.