Arkansas is about 219 times bigger than Saint Lucia.

Saint Lucia is approximately 616 sq km, while Arkansas is approximately 134,856 sq km, making Arkansas 21,792% larger than Saint Lucia. Meanwhile, the population of Saint Lucia is ~167,122 people (2.7 million more people live in Arkansas).
Tip: This to-scale comparison of Saint Lucia vs. Arkansas uses the Mercator projection, which distorts the size of regions near the poles.