The flag of New Zealand has an aspect ratio of 1:2. It consists of two main elements: the Union Jack in the canton (upper hoist quarter) and the Southern Cross on a blue field.

Colors:

• Blue (background): Pantone 286C, HEX #003399, RGB (0, 51, 153)
• Red (Union Jack and stars): Pantone 186C, HEX #CC0000, RGB (204, 0, 0)
• White (Union Jack and stars outline): HEX #FFFFFF, RGB (255, 255, 255)

Geometric properties and measurements:

1. Union Jack:

   • The width of the white border around the red cross is 1/15 of the flag's height.
   • The width of the white border around the red saltire is 1/30 of the flag's height.
   • The red cross and saltire are centered within the white borders.

2. Southern Cross:

   • Consists of four five-pointed red stars with white borders.
   • Stars' diameters: Alpha Crucis (largest star) is 1/7 of the flag's height; Beta, Gamma, and Delta Crucis are 1/14 of the flag's height.
   • Star positions: Alpha Crucis is closest to the fly edge, followed by Beta, Gamma, and Delta Crucis towards the hoist edge.
   • The stars form an irregular diamond shape, with Alpha and Delta Crucis aligned vertically and Beta and Gamma Crucis aligned horizontally.