The flag of Sierra Leone has a horizontal tricolor design with three equally-sized bands. The top band is green, the middle band is white, and the bottom band is blue.

Color codes:

• Green: Pantone 347 U (hex #1EB53A)
• White: No specific code (hex #FFFFFF)
• Blue: Pantone 286 U (hex #0072CE)

The flag's aspect ratio is 2:3, meaning its width is two-thirds of its length.

There are no specific geometric properties or measurements beyond the equal division of the three bands.