Flag Royal Standard Australia

The Queen's Personal Australian Flag, sometimes known as the Royal Standard of Australia is the personal flag of Queen Elizabeth II in her role as Queen of Australia. The flag was approved for use in 1962. It is only used by the Queen when she is in Australia, or attending an event abroad in her role as head of state of Australia. The Queen's representative, the Governor-General of Australia has a separate flag.
The flag consists of a banner of the coat of arms of Australia, defaced with a gold seven-pointed federation star with a blue disc containing the letter E below a crown, surrounded by a garland of golden roses.
The six sections of the flag taken from the coat of arms each represents the arms of the Australian states:

• The Upper Left represents New South Wales and bears a red St George's Cross, upon which is a gold lion in the centre and a gold star on each arm.
• The Upper Middle represents Victoria and contains a Crown and five white stars on a blue field.
• The Upper Right represents Queensland and consists of a blue Maltese cross, bearing a Crown, on a white field.
• The Lower Left represents South Australia and includes a Piping Shrike on a gold field.
• The Lower Middle represents Western Australia and consists of a black swan on a gold field.
• The Lower Right represents Tasmania and contains a red lion on a white field.

The gold seven-pointed star, represents the states and the territories. The blue disc is taken from the Queen's Personal Flag as used for duties within the Commonwealth of Nations.

Reference: Wikipedia