Canberra is about 2.5 times smaller than Mauritius.

Mauritius is approximately 2,040 sq km, while Canberra is approximately 814 sq km, making Canberra 39.91% the size of Mauritius.
Tip: This to-scale comparison of Mauritius vs. Canberra uses the Mercator projection, which distorts the size of regions near the poles.