The flag of Jersey has a red saltire on a white background, with the badge of Jersey in the center. The badge is a yellow shield with three lions passant guardant in red, surmounted by a yellow crown. The aspect ratio of the flag is 3:5, and its geometric properties are rectangular. The color codes for the flag are as follows:

• Red: Pantone 186 C / RGB 206, 17, 38 / CMYK 0, 100, 81, 12
• White: No official specifications, but generally a pure white
• Yellow: Pantone Yellow C / RGB 255, 204, 0 / CMYK 0, 20, 100, 0

The badge of Jersey in the center of the flag measures one-third of the height of the flag and is positioned one-third of the way from the hoist side. The three lions on the shield are symbolically known as "les trois léopards" in French (the three leopards), although they are often referred to as lions.