District of Columbia is about 3,410 times smaller than Ukraine.

Ukraine is approximately 603,550 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.03% the size of Ukraine. Meanwhile, the population of Ukraine is ~43.5 million people (42.9 million fewer people live in District of Columbia).
Tip: This to-scale comparison of Ukraine vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.