Saint Lucia is about 219 times smaller than Arkansas.

Arkansas is approximately 134,856 sq km, while Saint Lucia is approximately 616 sq km, making Saint Lucia 0.46% the size of Arkansas. Meanwhile, the population of Arkansas is ~2.9 million people (2.7 million fewer people live in Saint Lucia).
Tip: This to-scale comparison of Arkansas vs. Saint Lucia uses the Mercator projection, which distorts the size of regions near the poles.