We had a printer in one of the sites I work at that could print lots of weird and wonderful paper sizes, I think A2 was the maximum.

It would remember your last used settings though, so if you'd needed to print some map or drawing on a page you could see from space, you had to manually select that paper tray, but critically you had to remember to change it back. Whatever tray you sent the job to, the printer would automatically scale it to size.

If you'd printed a diagram one moment and printed a team sheet for the next day, forgetting that critical interim step, you'd end up with a list of people assigned to tasks that ordinarily be an A4 page, printed at 400% size and having to be blu-tac'd to the wall rather than just pinned as usual.

I say "having to", it could easily be reprinted in A4, but it did the same job and conveyed the same information.

It was entertaining seeing the odd letter appearing in A2 which had no hope of ever fitting in an envelope, or someone's kid's four-to-a-page birthday invites inadvertently blasted into A3, negating the point of it being small and able to be stuck to the fridge or whatever.

Fun times.