What does this number measure?
A laboratory assembled in orbit around Earth. The International Space Station combines inhabited modules, a supporting structure and large solar panels. The stated span includes its large extensions, not just the habitable space.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.
International Space Station, main horizontal span.
Start of orbital assembly: 1998. Proposed historical date; an existing documentary source is linked but was not consulted for this date in this session. Do not interpret this reference as the manufacturing date of the illustrated specimen. The ISS is assembled progressively. 1998 refers to the launch of its first module and the start of assembly, not a single completion date.