Flags with Unique Shapes or Proportions

Most national flags are rectangular and follow common aspect ratios such as 2:3 or 1:2. However, some flags stand out due to their unusual shapes, proportions, or design features. This includes not only national flags, but also flags of subnational entities like states, provinces, and territories.

Nepal – The Only Non-Rectangular National Flag

Nepal’s flag is famous for its unique shape: two stacked triangles forming a double pennant. It is the only national flag that is not quadrilateral. The design represents the Himalayan mountains and includes a sun and a moon, symbolizing permanence and hope.

Switzerland and Vatican City – Square Flags

Both Switzerland and Vatican City have official square flags. Switzerland’s red field with a white cross is widely recognized, while Vatican City’s gold and white vertical bands with the papal insignia make it visually distinct. These square formats are rare among sovereign nations.

Qatar – The Longest National Flag

Qatar’s flag has an official aspect ratio of 11:28, making it significantly longer than most. The maroon and white design with a serrated edge symbolizes Qatar’s heritage and agreements with Britain in the 19th century.

Subnational Flags with Unusual Shapes

Some states and regions also have flag designs that break conventions:

• Ohio (USA): The only U.S. state with a non-rectangular flag. Its swallowtail (burgee) shape and bold design make it instantly recognizable.
• In Switzerland, the square format is not limited to the national flag—most of the 26 cantonal flags are also square by tradition. This includes flags like those of Zurich, Bern, and Ticino. However, there are exceptions: the flags of Jura and Valais are usually shown in a rectangular 2:3 format. The square shape is part of Switzerland’s vexillological heritage and contributes to a strong visual consistency in national and cantonal symbols.