Saint Lucia is about 228 times smaller than Wisconsin.

Wisconsin is approximately 140,663 sq km, while Saint Lucia is approximately 616 sq km, making Saint Lucia 0.44% the size of Wisconsin. Meanwhile, the population of Wisconsin is ~5.7 million people (5.5 million fewer people live in Saint Lucia).
Tip: This to-scale comparison of Wisconsin vs. Saint Lucia uses the Mercator projection, which distorts the size of regions near the poles.