The flag of Jersey has an aspect ratio of 3:5. It consists of a red saltire (diagonal cross) on a white field, with the badge of Jersey in the upper quadrant nearest to the hoist. The red saltire has color code #C8102E, and the white field has color code #FFFFFF.

The badge of Jersey is a red shield with three gold leopards passant guardant (walking and facing the observer), arranged two over one. The red shield has color code #C8102E, and the gold leopards have color code #FFD700.

Geometric properties and measurements are not standardized for flags, but the key elements are the red saltire, white field, and the badge of Jersey in the upper quadrant nearest to the hoist.