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Flag proportions in Europe: which one to use, and why the host decides

Order two flags of the same height and they may still not match. One can come out square, another twice as long as it is tall. The reason is the proportion: the ratio between a flag's height and its width. Every country fixes its own, and when flags fly together the choice follows a simple courtesy.

Italiana Bandiere · 29 September 2026 · 4 min read

What the numbers mean

The proportion is written height first. A 2:3 flag is two units tall and three wide: 100x150cm, for example. A 1:2 flag is twice as wide as it is tall: 100x200cm. A 1:1 flag is square.

So a 100cm-tall flag can be 150cm, 167cm or 200cm wide, depending on the country.

The proportions of Europe

Each country sets its proportion in its own law or custom. Here is where Europe stands, height to width.

Country Proportion Good to know
Albania 5:7
Andorra 7:10 The plain civil flag is often made in 2:3
Austria 2:3 Fixed by law for the state flag only
Belarus 1:2
Belgium 13:15 Almost square on paper, but most Belgian flags, government ones included, are 2:3
Bosnia and Herzegovina 1:2
Bulgaria 3:5
Croatia 1:2
Cyprus 2:3
Czech Republic 2:3
Denmark 28:37
Estonia 7:11
Finland 11:18
France 2:3
Germany 3:5
Greece 2:3
Hungary 1:2 Set for government buildings; 2:3 is common too
Iceland 18:25
Ireland 1:2
Italy 2:3
Kosovo 5:7
Latvia 1:2
Liechtenstein 3:5
Lithuania 3:5
Luxembourg 1:2 or 3:5 Both are legal; 3:5 is the usual one
Malta 2:3
Moldova 1:2
Monaco 4:5 Usually flown in 2:3
Montenegro 1:2
Netherlands 2:3 By custom: no law fixes it
North Macedonia 1:2
Norway 8:11
Poland 5:8
Portugal 2:3
Romania 2:3
San Marino 3:4 2:3 is allowed for international use
Serbia 2:3
Slovakia 2:3
Slovenia 1:2
Spain 2:3
Sweden 5:8
Switzerland 1:1 Square on land; 2:3 at sea
Ukraine 2:3
United Kingdom 3:5 or 1:2 No law fixes it: 3:5 is usual on land, 1:2 at sea
Vatican City 1:1
European Union 2:3

2:3 is the most common, followed by 1:2. The rest is a colourful collection of exceptions.

The etiquette: the guest follows the host

When flags fly side by side, they should look like equals: poles of the same height, flags of the same size. Different proportions break that. On the same pole, a 1:2 flag looks longer than its 2:3 neighbour, and a square one looks smaller.

The way to keep them equal is to follow the host. The flags of the guests take the proportion of the host country's flag. In Italy every flag in the row is 2:3, so an Irish or a Slovenian flag flown next to the Tricolore is made in 2:3, not in its official 1:2. In Slovenia it works the other way round: the Italian flag flown next to the Slovenian one is 1:2.

The Italian 2:3 flag next to the Irish 1:2 flag on poles of the same height, then both in 2:3 when flown together in Italy
On the same pole, the official 1:2 of Ireland looks longer than the Italian 2:3. Flown together in Italy, both are 2:3.

A flag flying alone in its own country simply keeps its official proportion.

What the institutions do

No law spells out the host rule for national flags. It is the practice of the trade, and it follows from rules that do exist:

  • Same size. The United States Flag Code asks that the flags of two or more nations be "of approximately equal size". A German federal decree of 2005 says that flags set on one building should be the same size.
  • One proportion for the whole row. At the United Nations in New York, the member flags were all made the same size and in 2:3, as the UN Chronicle described in 1992. At the London 2012 Olympics every national flag was made in 2:3, including Switzerland's.
  • The host sets it. The UN wrote this principle into the rules for its own flag, which may take "the same proportions as the national flag of any country in which the United Nations Flag is flown". In Britain, the Flag Institute recommends 3:5, the British proportion on land, when all the flags in a display must share one shape.

Choosing with us

We make flags in 2:3 and in 1:2. On every product page, the line Sizes for proportion shows the proportion in use, and Change opens the other one. 3:5 is not available yet.

For the short version, see our Help article What is the «proportion», and which one is right for my flag?. To see where the flags go on a public building, read How to display the Italian flag correctly.

Looking for a flag? Browse our European flags.

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