The flag of Pitcairn Islands consists of a blue field with a British Union Jack in the upper left corner and a coat of arms centered on the right half of the flag. The coat of arms features a shield depicting a yellow anchor on a blue background, surrounded by a wreath of green and white leaves. Above the shield is a stylized depiction of the island's longboat, and below it is a banner reading "Pitcairn Islands". The flag has an aspect ratio of 1:2 and its colors are specified by Pantone and CMYK codes as follows:

• Blue: Pantone 286 C / CMYK 100-72-0-7
• Red: Pantone 186 C / CMYK 0-100-81-4
• Yellow: Pantone Yellow C / CMYK 0-14-100-0
• Green: Pantone 356 C / CMYK 85-0-100-0

The geometric properties and measurements of the flag are not specified by official sources, but it typically appears to be about twice as long as it is wide.