Saint Pierre and Miquelon is about 1.4 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while Saint Pierre and Miquelon is approximately 242 sq km, making Saint Pierre and Miquelon 37% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (596,466 fewer people live in Saint Pierre and Miquelon).
Tip: This to-scale comparison of District of Columbia vs. Saint Pierre and Miquelon uses the Mercator projection, which distorts the size of regions near the poles.