FLAG BASICS
Flag Basics
Why is Nepal's flag not rectangular? Why is Switzerland's flag square? Why do so many flags use red, white and blue? Why do some flags look almost identical? And who decides what a national flag should look like in the first place?
A flag is more than a label for a country. Its shape, colours, symbols, history and uses can open many different ways to explore the place it represents.
This guide introduces twelve ideas that will make flags more interesting to look at. You do not need to memorise technical terms. If you finish thinking, “I never knew flags went that deep,” that is a perfect place to begin.
What is a national flag, really?
A national flag is one of the main symbols of a country. It flies at government buildings, identifies countries at international meetings and appears beside athletes at events such as the Olympic Games. A glance at a flag can tell us, “That is Japan,” “That is France,” or “That is Brazil.”
Yet there is no single global rulebook that defines every national flag. One country may describe its flag in a constitution, another in legislation, and another through an official specification or long-established practice.
National flags do not all come from the same system. Once you know that, they begin to look less like a set of labels and more like clues to how different countries work.
KOKKI EARTH also introduces the flags of certain regions as part of its collection of 198 countries and regions.
Who decides what a flag looks like?
The answer depends on the country.
Nepal's constitution sets out both the form of the flag and a method for constructing it. Japan's Act on National Flag and Anthem defines the form of the Hinomaru. Swiss federal law defines the Swiss flag and the Swiss cross.
The design itself and the rules for displaying it can also come from different places. Canada explains that flag etiquette for private individuals and organisations is based on established practice, not compulsory legislation. Government rules do apply at federal properties and events.
A useful question is therefore not only “Who defined this design?” but also “Are the rules for the design and the rules for using it separate?”
Constitution of Nepal ↗ Japan’s flag law ↗ Government of Canada ↗
Are all national flags rectangular?
Most are rectangular. Not all are.
Nepal's flag is made from two triangular shapes. Switzerland's is square. Vatican City's 2026 Fundamental Law shows a square model in Annex A.
Even rectangular flags do not share one standard proportion. Canada's flag is 1:2, and other countries use many different ratios. So “national flags are basically 2:3” is not a reliable rule.
Shape is part of the design, just like colour and symbols. Put Nepal, Switzerland and Vatican City side by side and the world of flags suddenly looks much less uniform—and much more interesting.
A non-rectangular flag formed from two triangular shapes
A national flag defined in law as square
A square flag model shown in Annex A of the 2026 Fundamental Law
Swiss federal law ↗ Canadian technical specification ↗ Vatican Fundamental Law, Article 24 and Annex A ↗
Do flag colours have fixed meanings?
You may have seen lists saying that red means courage, blue means freedom and white means peace. Those ideas are not a universal key to every flag.
The same colour can grow from very different histories—from dynasties, independence, sacrifice, communities or the natural landscape. Some countries do not assign a separate official meaning to every colour at all. The Government of South Africa cautions against attaching one fixed meaning to each individual colour in its flag.
Instead of asking, “What does this colour usually mean?”, try asking, “Why does this country use this colour?” That small change can lead from a flag into a much larger story.
Why do flags use stars, crescents and crosses?
Look closely and you can find stars, suns, moons and crescents, crosses, animals, plants, writing, coats of arms and geometric patterns. A flag may use one star or many. Two crosses can differ in shape, colour and history.
The surprising part is that the same shape does not guarantee the same meaning. Begin by asking three simple questions: What can I see? How many are there? Where are they placed? Then investigate the meaning and history.
Explore real examples by theme in Flag Features, or see what you recognise in the Flag Quiz.
Is a flag the same as a coat of arms?
They can be connected, but they are not the same thing. A flag is a flag. A coat of arms or national emblem is another kind of symbol.
Some countries place a coat of arms or emblem on their flag. Others pair a simple flag with a much more detailed emblem. The terms coat of arms and national emblem are not perfectly interchangeable either; their meanings depend on legal systems, languages and heraldic traditions.
For a first step, remember this: a country can have several important symbols besides its flag. Follow those symbols and you may uncover layers of history that the flag alone does not show.
Can one country use more than one flag?
It can. Different flags may be used by private citizens, government bodies or the military. At sea, ships may use separate ensigns.
Vexillology uses terms such as civil flag, state flag, war flag, civil ensign, state ensign and naval ensign to organise these uses. But this is not a checklist that every country follows. A single design may serve several roles.
You do not need to memorise all the labels. The key idea is simple: one country may use different flags for different purposes.
What happens when a flag is hung vertically?
This is one of the most easily overlooked parts of flag design. Turning a horizontal flag by 90 degrees is not always the whole answer.
Canada says that when its flag hangs vertically, the top point of the maple leaf should face the observer's left. South Africa gives instructions for the position of the red band when its flag is displayed vertically. Flags with writing or an emblem may require the design to remain upright or to be adjusted.
In other words, vertical display can have rules of its own. The next time you see flags hanging down a street, look for what changed—and what stayed upright.
Canadian vertical-display guidance ↗ South African display guidance ↗
Is there a right way to handle a flag?
Yes, but the details are not the same everywhere.
Countries may have rules or customs about when a flag is flown, how several flags are arranged, how half-masting works and what happens to a damaged flag. Those instructions can come from legislation, government guidance, ceremony or long-standing practice.
The United States Flag Code is well known, but it concerns the flag of the United States. It is not a worldwide code for every national flag. Respect for flags is common in many places; the exact way that respect is shown must be checked country by country.
Why do some flags look so similar?
Anyone learning flags soon has this moment: “Didn't I just see that one?” There is no single reason for the resemblance.
Countries may share history, regional traditions or design families. Nordic countries use the cross pattern. Some African flags are connected with colours often called Pan-African, while shared colour combinations also appear across Arab countries. Tricolours form another broad tradition. In other cases, flags with no documented common origin simply end up looking alike.
Compare Romania and Chad, Indonesia and Monaco, or Australia and New Zealand. KOKKI EARTH treats “these look alike” and “these share an origin” as two different questions.
Visit Similar Flags to look for the differences and the stories behind them. Nordic Co-operation ↗
Can national flags change?
They can—and the history of almost any region reveals examples.
A flag may change after independence, a change of political system or country name, or a revision to a coat of arms. Sometimes only a colour specification or construction detail changes. South Africa's current national flag was first used on 27 April 1994, according to the government.
Here is another useful surprise: the date a flag was first used, the date it gained legal status and the date its technical details were fixed may not be the same. Put an older flag beside the current one and you may see a country's history unfold.
How can you look at a flag more closely?
Do not stop at the first image you find. Ask about the shape and proportions. Check how colours are specified, where stars or emblems sit, which version is used for which purpose, and when the current design took shape. When accuracy matters, follow the trail to a government publication, law or official specification.
You do not have to investigate everything at once. One question—“Why is it shaped like that?”—is enough to begin.
A flag can hold clues to geography, history, culture, institutions and the natural world. Start with one design, learn about one country, compare it with a neighbour and let your curiosity expand from there. That is the kind of journey KOKKI EARTH is built for.
Choose a flag from the 198-country-and-region directory, or compare countries in World Rankings.
Sources and further reading
The examples and rules on this page are checked against government publications, legislation, public institutions and vexillological references. Flag laws and official specifications can change. If you plan to display a flag or need exact technical details, consult the latest guidance from the relevant authorities.