Vermont is about 9 times smaller than Idaho.

Idaho is approximately 214,314 sq km, while Vermont is approximately 23,956 sq km, making Vermont 11.18% the size of Idaho. Meanwhile, the population of Idaho is ~1.6 million people (941,841 fewer people live in Vermont).
Tip: This to-scale comparison of Idaho vs. Vermont uses the Mercator projection, which distorts the size of regions near the poles.