The flag of Guinea consists of three equal vertical bands of red, yellow, and green with a small image of a yellow five-pointed star centered in the middle black stripe. The aspect ratio is 2:3, and the height of each band is one-third of the total height of the flag. The color codes for the flag are:

• Red: Pantone 186C; RGB 213, 0, 0
• Yellow: Pantone 116C; RGB 255, 204, 0
• Green: Pantone 356C; RGB 0, 128, 0
• Black: Pantone Black C; RGB 0, 0, 0

The yellow star in the center has a diameter of one-fifth the height of the flag (or 12% of the total flag area). There are no official measurements for the flag's dimensions or the size of the star, but the flag is typically produced in sizes ranging from about 2 feet by 3 feet to 10 feet by 15 feet.