The flag's official proportions of 13:15 are rarely seen; proportions of 2:3 or similar are more common.
The Brussels region is the de facto capital, but the City of Brussels municipality is the de jure capital
The .eu domain is also used, as it is shared with other European Union member states.

Coordinates: 50°50′N 4°00′E / 50.833°N 4.000°E / 50.833; 4.000

– in Europe (green & dark grey)
– in the European Union (green)

Belgium (ⁱ/ˈbɛldʒəm/; Dutch: België [ˈbɛlɣijə]; French: Belgique [bɛlʒik]; German: Belgien [ˈbɛlɡiən̩]), officially the Kingdom of Belgium, is a sovereign state in Western Europe bordered by France, the Netherlands, Germany, Luxembourg, and the North Sea. It is a small, densely populated country which covers an area of 30,528 square kilometres (11,787 sq mi) and has a population of about 11 million people. Straddling the cultural boundary between Germanic and Latin Europe, Belgium is home to two main linguistic groups: the Dutch-speaking, mostly Flemish community, which constitutes about 59% of the population, and the French-speaking, mostly Walloon population, which comprises 41% of all Belgians. Additionally, there is a small group of German-speakers who live in the East Cantons located around the High Fens area, and bordering Germany.

...
Wikipedia