By the development of the NX-Alpha in 2143, the Starfleet rank structure had at least three enlisted ranks, four officer ranks, and three ranks for use by flag officers. Silver rank pips were displayed on the right breast of th… See more

Early 23rd century
By the 2230s, the Starfleet uniform used a sleeve stripe system instead of pips to denote … See more

By the year 2355, Starfleet had introduced a new uniform design, with a pip system of golden pin insignia worn on the collar. (TNG: "The Battle")
The 24th century pip system included a black pip in… See more

By the year 2399, Starfleet's familiar pip design had been relocated from the collar to the right breast of the uniform and the pips had become silver. (PIC: "Remembrance") By the early 2400s, the silver rank … See more