With the exception of ( Nepal ) s, the national flags of the states of this world are rectangular, but have different aspect ratios , i.e. the proportions that are listed here. This breakdown includes the list of national flags of 202 states. In addition to the national flags of the 193 states recognized by the UN , the flags of the de facto states Taiwan, Cook Islands, Kosovo, Niue, Northern Cyprus, Palestine, Somaliland, Vatican City and the Western Sahara annexed by Morocco are listed.
In addition to Nepal, there is another exception to the proportions of state flags, namely that of the American state Ohio .
Tabular overview of the official proportions
circumscribing rectangle of the red interior of the flag of Nepal
bThere is an official geometric design rule for the national flag of Nepal. If this construction is carried out algebraically, the aspect ratio of the circumscribing rectangle results in an algebraic number of the fourth degree, which can be expressed in the form where integers are.
Many of the flags listed here are also used in other proportions, for example the flag of the USA instead of 10:19 in 3: 5 or the flag of Belgium in 2: 3 instead of 13:15. This is partly due to the fact that the proportions are only set by some governments for an officially used flag, but also to the tendency of many flag manufacturers to offer only a few standard proportions (2: 3; 1: 2; 3: 5) in order to save costs . In addition, there are some countries that have different proportions for their flags for land and sea use (for example Grenada , Switzerland and Guyana ). In these cases, the above table shows the proportion of the flag to the country.