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

District of Columbia is approximately 177 sq km, while Ukraine is approximately 603,550 sq km, making Ukraine 340,889% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (42.9 million more people live in Ukraine).
Tip: This to-scale comparison of District of Columbia vs. Ukraine uses the Mercator projection, which distorts the size of regions near the poles.