Grenada is about 1.9 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while Grenada is approximately 344 sq km, making Grenada 94% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (487,774 fewer people live in Grenada).
Tip: This to-scale comparison of District of Columbia vs. Grenada uses the Mercator projection, which distorts the size of regions near the poles.