The flag of Pitcairn Islands features a blue ensign with the British Union Jack in the upper hoist-side quadrant, and the Pitcairn Islander coat of arms centered on the outer half of the flag. The coat of arms includes a shield with a yellow anchor, surrounded by a green laurel wreath, and topped by a stylized Pitcairn Islander helmet. The flag has an aspect ratio of 1:2 and its dimensions are approximately 135 cm x 270 cm. The colors used in the flag are:

• Blue: Pantone 280 C / RGB: 0, 33, 71 / Hex: #002147
• Red: Pantone 186 C / RGB: 213, 43, 30 / Hex: #D52B1E
• Yellow: Pantone 116 C / RGB: 255, 211, 41 / Hex: #FFD329
• Green: Pantone 356 C / RGB: 0, 122, 61 / Hex: #007A3D

The flag has a ratio of 1:2, which means it is twice as long as it is wide. The coat of arms is positioned so that its center point is halfway between the left-hand side and the centerline of the flag. The diameter of the laurel wreath is about 9/16 of the height of the shield.