Bow to aft of nacelles

Photo from Wikimedia Commons
USS Enterprise NCC-1701
The Constitution-class flagship of the United Federation of Planets/Pop Culture
The USS Enterprise NCC-1701 from Star Trek: The Original Series is one of the most recognizable spacecraft in fiction. According to official Star Trek technical manuals, the ship is 289 m long, 127 m wide across the saucer section, and has a mass of approximately 1 million metric tons. The ship carries a crew of 430 and can achieve speeds faster than light via its warp drive. Its design, with a saucer section connected to twin nacelles by a secondary hull, became the template for starship design in popular culture.
Measurements
Primary hull width
Keel to top of bridge
Approximately 1 million metric tons
Each warp nacelle
Main bridge module atop saucer