Saint Lucia is about 235 times smaller than Iowa.

Iowa is approximately 144,701 sq km, while Saint Lucia is approximately 616 sq km, making Saint Lucia 0.43% the size of Iowa. Meanwhile, the population of Iowa is ~3.0 million people (2.9 million fewer people live in Saint Lucia).
Tip: This to-scale comparison of Iowa vs. Saint Lucia uses the Mercator projection, which distorts the size of regions near the poles.