Wisconsin is about 327 times bigger than Barbados.

Barbados is approximately 430 sq km, while Wisconsin is approximately 140,663 sq km, making Wisconsin 32,612% larger than Barbados. Meanwhile, the population of Barbados is ~302,674 people (5.4 million more people live in Wisconsin).
Tip: This to-scale comparison of Barbados vs. Wisconsin uses the Mercator projection, which distorts the size of regions near the poles.
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