Mile-Long Starship: Some bigger classes easily fall into this category or above: dreadnoughts and superdreadnoughts, grapeship megafreighters, the top end of highliners, colony seedships, mobile factories, that sort of thing, and – of course – city-ships.

Special note here to most lighthuggers, which have to accommodate vast quantities of deuterium and antideuterium and whose antimatter-pion-torch engines are so ridiculously lethal to be near that you want them on the end of a very long spine indeed.