The flag of Wallis and Futuna is a red field with a white cross dividing it into four quadrants. In the upper left quadrant, there's a small French Tricolor flag (blue, white, and red vertical stripes). The aspect ratio of the flag is 2:3.

Color codes:

• Red: #ED2939
• Blue: #002395
• White: #FFFFFF

Geometric properties and measurements:

• The white cross has a width equal to 1/6th of the flag's height.
• The French Tricolor in the upper left quadrant has dimensions of 2/5ths of the flag's height and 1/3rd of the flag's width.

Other relevant information:

• The flag was officially adopted on April 29, 1986.
• It is also known as the "Flag of Uvea" or the "Kingdom of Uvea Flag."