For its most formal uniforms, the Dinner Dress White and Blue Jacket, the U.S. Public Health Service Commissioned Corps prescribes the use of linked, 28-ligne buttons embossed with the Corps device to serve as the jacket closure. Held together by a link chain roughly 3/4-inch long, the two buttons augment the six 35-ligne buttons on the Dinner Dress Blue Jacket and the four 35-ligne buttons of the Dinner Dress White Jacket.
Link chain closures are eschewed for the female versions of these uniforms. The six buttons on the female Dinner Dress White and Dinner Dress Blue Jackets are considerably smaller (22.5-ligne) than those on their male counterparts, but they are not used for closure. The female Dinner Dress White Jacket also varies from the male version in that insignia is displayed with sleeve stripes and the Corps device; male personnel wear hard shoulder boards with these insignia on them.