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Standard Proportions For The United States Flag

Standard Proportions

Hoist (width) of flag (A) 1.0
Fly (length) of flag (B) 1.9
Hoist (width) of Union (C) 0.5385 (7/13)
Fly (length) of Union (D) 0.76
(E) 0.054
(F) 0.054
(G) 0.063
(H) 0.063
Diameter of star (K) 0.0616
Width of stripe (L) 0.0769 ( 1/13)

The official regulation at the Defense Technology Information Center website is General Services Administration "Federal Specification, Flag, National, United States of America and Flag, Union Jack," DDD-F-416E, dated November 27, 1981. It specifies the colors by reference to "Standard Color Cards of America" maintained by the Color Association of the United States, Inc. These are:

Cable No. 70180 Old Glory Red
Cable No. 70001 White
Cable No. 70075 Old Glory Blue

In the Pantone system the colors are: Blue PMS 282 and Red PMS 193.

View the Government drawing (45k gif 1493 pixels w x 879 pixels h) specifying the Flags dimensions.