The answer varies from country to country. Excluding Nepal, which has a non-rectangular flag, the most common height to width ratio, used by 45% of the sovereign states in the world is 2:3. The next most common is 1:2 (used by 28%) followed by 3:5 (10%). There are many other ratios in use - 10:19, 22:41, 11:20, 189:335, 4:7, 11:18, phi (the Golden Ratio), 5:8, 7:11, 15:22, 7:10, 5:7, 18:25, 8:11, 3:4, 28:37, 4:5, 6:7, 13:15 and 1:1.
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The ratio is 3:1 in the Cameroon flag.
The length and breadth of our National Flag is in the ratio of 3 : 2.
2:3 a ratio of a national flag is based upon darwins philosophy that i dont knpow
the ratio of the length to width of the national flag or Singapore is 5 : 3
2:3