The flag of Tonga has a red field with a white canton containing a red couped cross. The dimensions of the flag are in a ratio of 1:2, with the width being half the length. The canton occupies one-third of the total flag length and is positioned towards the hoist side. The geometric properties of the cross are not specified, but it is centered within the canton. The color codes for the flag are Pantone 186C for the red field and Pantone White for the canton and cross.