Saint Lucia is about 151 times smaller than Indiana.

Indiana is approximately 92,895 sq km, while Saint Lucia is approximately 616 sq km, making Saint Lucia 0.66% the size of Indiana. Meanwhile, the population of Indiana is ~6.5 million people (6.3 million fewer people live in Saint Lucia).
Tip: This to-scale comparison of Indiana vs. Saint Lucia uses the Mercator projection, which distorts the size of regions near the poles.