Cabin volume
Cabin volume is the interior space of the passenger cabin in cubic feet or metres, and it is a better guide to comfort than seat count. A very light jet has around 200 cubic feet, a light jet 300–400, a midsize 500–600, a super-midsize 700–900, a large-cabin jet 1,200–2,000 and an ultra-long-range aircraft over 2,500. Cabin height and width matter as much as length: a 6 ft flat-floor cabin transforms a five-hour flight compared with a 4 ft 9 in cabin with a dropped aisle. Manufacturers and operators sometimes quote maximum seats that assume every belted seat, including lavatory and divan positions, is used; ask what is comfortable for your group.