Flag of the United States

The colours are named in law, but no numeric values are given for any of them. The figures below are conventional values in wide use. Each value shows where it comes from, so you can choose the right level of certainty for your project.

Construction sheet

Thirteen horizontal stripes alternate red and white, with a blue union holding white stars. Height to length is 1 to 1.9; each stripe is 1/13 of the height.

Hoist (height)

1.0

Fly (length)

1.9

Union height

0.5385 (7/13 of the hoist)

Union length

0.76

Stripe width

0.0769 (1/13)

Star diameter

0.0616

Source: United States Code, Title 4, section 1: Flag; stripes and stars on (with Executive Order 10834 in the notes)