I have seen the US Army uniform regulations for the soft shoulder boards. They are worn on the epaulets of the shirt worn under the uniform blouse. They come in two sizes for male and female. The left hand one is worn by a male officer with his dress blue uniform. The one on the right is worn by a female officer with her dress green uniform. The dress green uniform is no longer a part of the US Army. The dress blue uniform has been adapted as both a service uniform and a dress uniform.