Western Sahara is about 11 times bigger than Maryland.

Maryland is approximately 25,314 sq km, while Western Sahara is approximately 266,000 sq km, making Western Sahara 951% larger than Maryland. Meanwhile, the population of Maryland is ~5.8 million people (5.1 million fewer people live in Western Sahara).
Tip: This to-scale comparison of Maryland vs. Western Sahara uses the Mercator projection, which distorts the size of regions near the poles.