Australia is smaller than Europe.
Australia is smaller; it is about 4/5 the size of Europe.
Australia
Australia is the only continent smaller than Europe.
I think you mean Australia instead of Austria, in which Australia is smaller than Europe in area.
Europe, Australia,
The two smallest continents are Australia and Europe. Australia is an island continent, however, Europe is not. Antarctica is the third smallest continent and is also an island continent.
Australia is no longer considered a continent. However, it is part of the continent Oceania which is smaller than Europe.
Australia and Europe
The two countries that are smaller in land area than Antarctica is Australia, and Europe
Australia is not a continent. However, Oceania is. It is mostly made of tiny islands and is much smaller than Europe.
It is Australia. Australia (9 million km2) is the only continent with a smaller land area then Europe (10.1 million km2).