Australia is approximately 7,741,220 sq km, while Finland is approximately 338,145 sq km, making Finland 4.37% the size of Australia. Meanwhile, the population of Australia is ~25.5 million people (19.9 million fewer people live in Finland).
This to-scale map shows a size comparison of Australia compared to Finland. For more details, see an in-depth quality of life comparison of Finland vs. Australia using our country comparison tool.