Delaware is about 4.7 times smaller than Vermont.

Vermont is approximately 23,956 sq km, while Delaware is approximately 5,060 sq km, making Delaware 21.12% the size of Vermont. Meanwhile, the population of Vermont is ~625,741 people (272,193 more people live in Delaware).
Tip: This to-scale comparison of Vermont vs. Delaware uses the Mercator projection, which distorts the size of regions near the poles.