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The national flag of Estonia (Estonian: Eesti lipp) is a tricolour featuring three equal horizontal bands of blue (top), black, and white. The normal size is 105 by 165 centimetres (41 in × 65 in). In Estonian it is colloquially called the "sinimustvalge" (lit. '"blue-black-white"'), after the colours of the bands. First adopted on 16 July 1922 after its independence, it was used as a national flag until 1940 when the Soviet Union occupied Estonia. After World War II, from 1944 to 1990, the Soviet Estonian flag consisted first of a generic red Soviet flag with the name of the republic, then changed to the red flag with a band of blue water waves near the bottom. The Estonian flag, which was also used by the Estonian government-in-exile, was officially re-adopted 7 August 1990 one year before its official restoration of independence.

Source: Wikipedia