Starfleet personnel are issued a series of service "ribbons" (in reality small, rectangular metal pins) with each medal they receive. In addition, they are issued an additional set of ribbons for unit citations, campaigns, major combat actions, combat actions against particular opponents, major exploratory expeditions, special certifications, dedicated service, and minor awards not otherwise authorized for issuance of full medals.
Personnel are expected to wear all issued ribbons with their dress uniforms, and for certain awards have the option to wear them on their duty uniforms as well.
For subsequent awards, raised devices are affixed to the ribbon indication multiple receipt of a single honor.
Ribbons are shown in order of precedence; for descriptions of each award, see: Starfleet Medals.