District of Columbia is about 7 times bigger than Saint Barthelemy.

Saint Barthelemy is approximately 25 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 608% larger than Saint Barthelemy. Meanwhile, the population of Saint Barthelemy is ~7,103 people (594,620 more people live in District of Columbia).
Tip: This to-scale comparison of Saint Barthelemy vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.