As the rhetoric between the Australian and Indonesian governments becomes more strained, here's a look at how the two countries compare on a number of metrics.
Population
With an estimated population of 251,160,124, Indonesia's population is just over 11 times larger than Australia's 22,262,501.
Source: CIA factbook
Economy
Indonesia's GDP (PPP) was estimated at $US1.237 trillion in 2012, substantially larger than Australia's $US986.7 billion.
Source: CIA factbook
Military
Australia spends much more on its military than Indonesia, with $US26,158 million in 2012, about 1.7% of GDP. Indonesia spent $US6,866 million, some 0.8% of GDP.
Source: SIPRI databases
Geography
Both Australia and Indonesia are large island nations with vast coastlines. Australia is larger at 7,692,024 square km to Indonesia's 1,922,570. Here is a size comparison of the two countries:

Source: Geoscience Australia, National Geographic
Quality of life
The UN publishes the Human Development Index, which combines health, education and income into a single index. Indonesia is ranked at 121 out of 185, with a HDI of 0.629 in 2012. This is below the average for the Asia-Pacific region, but is a significant increase over the 1990 value of 0.479, showing the quality of life in Indonesia is improving.
Australia is second only to Norway on the list with an HDI of 0.938.