Where in the world?
The flag of Nauru has a dark blue field with a thin yellow horizontal band across the center and a large white twelve-pointed star beneath the horizontal band on the hoist side of the field.

Nauru

Native Name: Republic of Nauru
Population: 11,680
Region: Oceania
Sub Region: Micronesia
Capital: Yaren
Top Level Domain: .nr
Currencies: Australian dollar
Languages: English
Border Countries: