Switzerland's flag is unusual because its normal national form is square, with a white cross on a red background. The Swiss federal government describes it as the only national flag in the world that is square.
Where did the Swiss cross come from?
The white cross on red has medieval roots. Switzerland's official information explains that the symbol was already important in 1339, when it was associated with the alliance of the Waldstätten and Bern at the Battle of Laupen.
Over time, the cross became a powerful symbol of Swiss identity.
When was the modern flag adopted?
The Swiss national flag in its modern constitutional form dates from 1848, when Switzerland became a federal state. The design was later given more precise legal definitions.
Switzerland's federal information notes that in 1889 the Federal Council defined the coat of arms with a white cross on red, with carefully specified proportions.
Why is it square?
The short answer is historical tradition. Switzerland did not start with the modern rectangular flag convention and then deliberately choose to break it. The square form developed from the country's historical banners and military standards and was retained as the national design.
That makes the shape part of Switzerland's identity rather than a decorative novelty.
There is an exception at sea
Swiss ships use a rectangular version of the Swiss flag. Switzerland's official guide explains that the national flag is square, while the flag used at sea can be rectangular.
Why is the cross important?
The cross is one of the strongest visual elements of Swiss identity. Its proportions are carefully defined, and Switzerland's modern regulations protect the design rather than leaving its appearance entirely to interpretation.
Switzerland and the Red Cross
The Swiss flag is also closely connected visually with the emblem of the International Committee of the Red Cross — but the two symbols are reversed: the Swiss flag is a white cross on red, while the Red Cross emblem is a red cross on white.
The resemblance is deliberate and historically significant, but the two are not interchangeable.
Explore Switzerland
Compare Switzerland with other flags in the Flag Explorer, or learn more about unusual flag designs through the FlagAtlas Guides.
Sources: Swiss Confederation — The Swiss flag; Swiss Confederation — A Brief Guide.