Shouldn't it be others' instead?

[Kohyoongliat]

A coach passenger claimed that her seat was smaller than others, prompting a tour guide to prove she was wrong.

Shouldn’t it be others’ instead?

Thanks.

[Arinker]

“Others” - other seats
“Others’ “- other people’s seats

[Anglophile]

Yes, I agree with @Arinker.

Others - other seats
Others’ - seats of others or seats of other people