Country size comparison
compared to
Oman is about 25 times smaller than Australia.
Australia is approximately 7,741,220 sq km, while Oman is approximately 309,500 sq km, making Oman 4.0% the size of Australia. Meanwhile, the population of Australia is ~26.1 million people (22.4 million fewer people live in Oman).
Compare further: Oman vs. Australia