The flag of Vatican City has an aspect ratio of 1:1, making it a square. It is divided vertically into two equal halves. The left half (hoist side) is yellow (#FFD700), and the right half is white (#FFFFFF). On the white half, there are two crossed keys, one silver (#C0C0C0) and one gold (#D4AF37), tied together by a red (#FF0000) cord. Above the keys, there is a papal tiara, also in gold (#D4AF37). The exact geometric properties and measurements may vary depending on the specific flag's size and production.