Hong Kong is about 4.6 times smaller than Delaware.

Delaware is approximately 5,060 sq km, while Hong Kong is approximately 1,108 sq km, making Hong Kong 21.9% the size of Delaware. Meanwhile, the population of Delaware is ~897,934 people (6.4 million more people live in Hong Kong).
Tip: This to-scale comparison of Delaware vs. Hong Kong uses the Mercator projection, which distorts the size of regions near the poles.