Where in the world?
The flag of Estonia has three horizontal stripes of blue, black, and white.

Estonia

Eesti

Population: 1,331,057

Region: Europe

Subregion: Northern Europe

Capital: Tallinn

Top Level Domain: .ee

Currencies: Euro

Border countries

The flag of Latvia has a carmine red field with a white horizontal stripe in the middle.

Latvia

Population: 1,901,548

Region: Europe

Capital: Riga
The flag of Russia has three horizontal stripes of white, blue, and red.

Russian Federation

Population: 144,104,080

Region: Europe

Capital: Moscow