Country size comparison
compared to
Brunei is about 11 times smaller than Sri Lanka.
Sri Lanka is approximately 65,610 sq km, while Brunei is approximately 5,765 sq km, making Brunei 8.79% the size of Sri Lanka. Meanwhile, the population of Sri Lanka is ~23.2 million people (22.7 million fewer people live in Brunei).
Compare further: Brunei vs. Sri Lanka