Air Force Instruction 36-2903, 8.6MB PDF, April 2022
Dress and Personal Appearance of Air Force Personnel

Army Uniform Regulation, AR 670-1, 1.6MB PDF, January 2021
Wear and Appearance of Army Uniforms and Insignia

Army Heraldic Activities, AR 840-10, 3.6 MB PDF, September 2016

Flags, Guidons, Streamers, Tabards, and Automobile and Aircraft Plates

USMC Uniform Regulations MCO P1020.34G, 3.71MB PDF, May 2018
Marine Corps Uniform Regulations

Navy Uniform Regulations, 10.39MB PDF, January 2006

For more information on Uniform Regulations for the Army: