Wisconsin is around the same size as Nicaragua.

Nicaragua is approximately 130,370 sq km, while Wisconsin is approximately 140,663 sq km, making Wisconsin 8% larger than Nicaragua. Meanwhile, the population of Nicaragua is ~6.3 million people (614,894 fewer people live in Wisconsin).
Tip: This to-scale comparison of Nicaragua vs. Wisconsin uses the Mercator projection, which distorts the size of regions near the poles.