🇧🇪Belgium

The national flag of the Kingdom of Belgium is a tricolour consisting of three equal vertical bands displaying the national colours: black, yellow, and red. The colours were taken from the coat of arms of the Duchy of Brabant, and the vertical design may be based on the flag of France. When flown, the black band is nearest the pole. It has the unusual proportions of 13∶15, and therefore, unlike the flags of Switzerland and the Vatican City, it is not a perfect square.