Country size comparison
compared to
Sri Lanka is about 11 times bigger than Brunei.
Brunei is approximately 5,765 sq km, while Sri Lanka is approximately 65,610 sq km, making Sri Lanka 1,038% larger than Brunei. Meanwhile, the population of Brunei is ~478,054 people (22.7 million more people live in Sri Lanka).
Compare further: Sri Lanka vs. Brunei