Michigan is around the same size as Western Sahara.

Western Sahara is approximately 266,000 sq km, while Michigan is approximately 250,493 sq km, making Michigan 94.17% the size of Western Sahara. Meanwhile, the population of Western Sahara is ~652,271 people (9.2 million more people live in Michigan).
Tip: This to-scale comparison of Western Sahara vs. Michigan uses the Mercator projection, which distorts the size of regions near the poles.