Vermont is about 135 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while Vermont is approximately 23,956 sq km, making Vermont 13,434% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (24,018 more people live in Vermont).
Tip: This to-scale comparison of District of Columbia vs. Vermont uses the Mercator projection, which distorts the size of regions near the poles.