Ratio
The ratio of a flag is its proportions, the height divided by the width. The ratio of a flag’s dimensions are usually reported as something like 2:3, which means that the height is 2/3 of the length, or 1:2, which would mean that the height is half the length. While a vast majority of National Flags are in the ratio of 2:3, there are few nations that have a ratio of 1:2 or 3:5 etc.