The flag of Vietnam consists of a rectangular red background with a large yellow five-pointed star centered in the middle. The aspect ratio is 2:3, and the flag's measurements typically range from 100x150cm to 400x600cm. The geometric properties of the flag are straightforward: it is a simple rectangle with a centered five-pointed star. The color codes for the flag are Pantone 186 C for the red background and Pantone Yellow C for the star.