Blue Dress "D"
COVER: you must wear the white "dress" cover. Do not wear the green service cover.
MARKSMANSHIP BADGES (optional) are centered above the left breast pocket with the bottom edge of the holding bar 1/8 inch above the pocket's top edge.
RIBBONS (optional) are centered 1/8 inch above and parallel to to top of the left pocket or 1/8 inch above the widest holding bar when marksmanship badges are worn.
BREAST INSIGNIA (optional) are centered 1/8 inch above the top row of ribbons.
ENLISTED GRADE INSIGNIA are centered on each sleeve, four inches below the shoulder seam (3 inches E8 and above)
OFFICER GRADE INSIGNIA are centered between the top and bottom edge of each collar, with the outer edge of the insignia once inch from the edge of the collar.
From The Order:
The blue dress uniform with short-sleeve khaki shirt (without coat) is designated as blue dress "D." Commanders may prescribe blue dress "D" as the uniform of the day for specified occasions or duties. During the winter uniform period, commanders may, at their discretion when the weather requires, authorize blue dress "D" as the uniform of the day. Commanders may prescribe this uniform for honors, parades, and ceremonies where climatic conditions preclude the comfortable wear of the blue dress "A" or "B" uniforms. This uniform is authorized for leave or liberty.
