Country size comparison
compared to
Brunei is about 5 times bigger than Hong Kong.
Hong Kong is approximately 1,108 sq km, while Brunei is approximately 5,765 sq km, making Brunei 420% larger than Hong Kong. Meanwhile, the population of Hong Kong is ~7.3 million people (6.8 million fewer people live in Brunei).
Compare further: Brunei vs. Hong Kong