Indiana is about 151 times bigger than Saint Lucia.

Saint Lucia is approximately 616 sq km, while Indiana is approximately 92,895 sq km, making Indiana 14,980% larger than Saint Lucia. Meanwhile, the population of Saint Lucia is ~167,122 people (6.3 million more people live in Indiana).
Tip: This to-scale comparison of Saint Lucia vs. Indiana uses the Mercator projection, which distorts the size of regions near the poles.