The flag of Nigeria consists of three vertical stripes of equal width. The aspect ratio is 1:2, meaning the flag's width is twice its height. The color codes for the stripes are as follows:

1. Green (left stripe): Pantone 347 C; HEX #008751
2. White (middle stripe): HEX #FFFFFF
3. Green (right stripe): Pantone 347 C; HEX #008751

The flag does not have any specific geometric properties or measurements other than the equal width of the three stripes and the 1:2 aspect ratio.