The flag of Serbia consists of three horizontal stripes - the top and bottom are red while the middle one is blue. The aspect ratio of the flag is 2:3, meaning that its width is twice its height. The exact color codes for the flag are:

• Red: #D10000
• Blue: #0A2463

The geometric properties and measurements for the Serbian flag are as follows:

• Height: 2 units
• Width: 3 units
• Ratio of each stripe's height to the total height of the flag: 1:2:1

The flag's design has been in use since 2010, when it was officially adopted by the National Assembly of Serbia.