https://www.spacex.com/vehicles/starship 123m or 403 feet in length.
https://www.businessinsider.com/spacex-starship-nasa-saturn-v-sls-moon-rockets-comparison-2019-7
https://www.nps.gov/wamo/faqs.htm 169m or 555 feet. https://en.wikipedia.org/wiki/Washington_Monument
Even the Skytrains in backwards Vancouver aren't allowed to be as long, due to such short stations. Of course the Montreal Metro can run 152.4m or 500 foot long trains, because of building longer stations in the first place.
