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Dark blue face of the flag. The top left corner for the British flag, indicating that the traditional relationship between Australia and the United Kingdom. "M" word's big seven-pointed star symbol of the composition of the Federation of Australia and the Federal District, six continents. By flagpole side top corner with the British Union Jack, relying on the lower side there is a white flag of the seven-pointed star; the rest are four large white seven-pointed star with a small white five-pointed star, represents the Pacific Ocean over the The Southern Cross constellation. 深蓝色旗面。左上角为英国国旗，表明澳与英国的传统关系。“米”字旗下的大七角星象征组成澳联邦的六个洲和联邦区。靠旗杆侧上角有英国米字旗，靠旗杆侧下部有一颗白色的七角星；其余部分有四颗较大的白色七角星与一颗较小的白色五角星，代表的是太平洋上空的南十字星座。

The flag of Australia was chosen in 1901 from entries in a worldwide design competition held following Federation. It was approved by Australian and British authorities over the next few years, although the exact specifications of the flag were changed several times both intentionally and as a result of confusion. The current specifications were published in 1934, and in 1954 the flag became legally recognised as the "Australian National Flag". The flag is a defaced Blue Ensign: a blue field with the Union Flag in the canton (upper hoist quarter), and a large white seven-pointed star known as the Commonwealth Star in the lower hoist quarter. The fly contains a representation of the Southern Cross constellation, made up of five white stars – one small five-pointed star and four, larger, seven-pointed stars.

In addition to the Blue Ensign there are several additional Australian flags, including the Aboriginal flag, the Torres Strait Islander flag and the flags of the Defence Forces. The design of the Australian flag is the subject of debate within Australia, with some advocating its redesign in connection with the republican movement.