Where in the world?
The flag of Saudi Arabia has a green field with white Arabic inscription and a sword.

Saudi Arabia

العربية السعودية

Population: 34,813,867

Region: Asia

Subregion: Western Asia

Capital: Riyadh

Top Level Domain: .sa

Currencies: Saudi riyal

Border countries

The flag of Iraq has three horizontal stripes of red, white, and black, with three green stars in the center of the white stripe.

Iraq

Population: 40,222,503

Region: Asia

Capital: Baghdad
The flag of Jordan has three horizontal stripes of black, white, and green, with a red chevron containing a white seven-pointed star.

Jordan

Population: 10,203,140

Region: Asia

Capital: Amman
The flag of Kuwait has three horizontal stripes of green, white, and red, with a black trapezoid on the hoist side.

Kuwait

Population: 4,270,563

Region: Asia

Capital: Kuwait City
The flag of Oman has three horizontal stripes of white, red, and green with a red vertical stripe on the left containing the national emblem.

Oman

Population: 5,106,622

Region: Asia

Capital: Muscat
The flag of Qatar has a maroon field with a broad white serrated band (nine white points) on the hoist side.

Qatar

Population: 2,881,060

Region: Asia

Capital: Doha
The flag of United Arab Emirates has a horizontal tricolor of green, white, and black with a vertical red stripe at the hoist.

United Arab Emirates

Population: 9,890,400

Region: Asia

Capital: Abu Dhabi
The flag of Yemen has three horizontal stripes of red, white, and black.

Yemen

Population: 29,825,968

Region: Asia

Capital: Sana'a