Australia is the smallest continent, with an area of approximately 7.69 million square kilometers. Below are the seven continents listed in order of size, from largest to smallest:

1. Asia: 44.579 million square kilometers

2. Africa: 30.37 million square kilometers

3. North America: 24.709 million square kilometers

4. South America: 17.84 million square kilometers

5. Antarctica: 13.88 million square kilometers

6. Europe: 10.18 million square kilometers

7. Australia: 7.69 million square kilometers