The flag of Timor-Leste has a rectangular shape with an aspect ratio of 1:2. It consists of two main parts: the upper left side is black and the lower right side is red, with a small white five-pointed star representing hope located towards the center of the flag. The color codes for the flag are:

• Black: Pantone Process Black C (CMYK: C=0 M=0 Y=0 K=100), RGB (0, 0, 0)
• Red: Pantone 485 C (CMYK: C=0 M=100 Y=100 K=0), RGB (255, 0, 0)
• White: Pantone Cool Gray 1 C (CMYK: C=0 M=0 Y=0 K=10), RGB (248, 248, 248)

The flag's dimensions are such that its width is twice its height, and the length of the diagonal connecting the bottom left corner to the top right corner is approximately 2.236 times the height of the flag.