That's nowhere near in proportion to other panel or hex nuts in general. The picture is at least way off. Funny how anyone would rather believe a typo though. I don't particularly care, just thought it was odd.
But if that's your opinion, fine, anything's possible, like the same thing that takes a 15/16" wrench, why not... as long as it says that. I'm not an expert on the subject, it was more along the lines of
"one of these things is not like the other". Panel nuts are weird anyway.
Words can be weird too.

See, that's referring to a panel bed frame, but I looked up
weird!