[libreoffice-users] Incorrect envelope dimensions passed to print driver

LibreOffice 7.4.2.3, Windows 10 -
Before reporting this as a bug, I would like to put this question here, because I am missing 
something.

LO includes in its paper size library "#6-3/4 Envelope", a common North American size defined as:
     3-5/8 (3.63) in (inches) high by 6-1/2 (6.5) in wide in the customary landscape orientation.
When selected as the paper format, it sets up perfectly ... until it's time to print.
Then it passes to the "Print" dialog box (for a Konica Minolta C368, in either PS or PCL6 driver) a 
size of
     6.5 in high by 5.5 in ("User Defined") wide.
That of course is not landscape orientation, and the accompanying figure (on the left side of the Print 
dialog box) is shown accordingly - that is, in portrait, not landscape, orientation.  Yet if I select 
"Properties" in the dialog box, to go to the printer driver's own settings, it is portrayed in 
landscape orientation, though still incorrectly sized:
     5.5 in high by 6.5 in wide ("Custom Size").

The fact that orientation shifts when passed to the Print dialog box, then shifts again when passed 
to the printer driver, clearly seems to be a bug, and I intend to report it as such -- as soon as I 
understand why dimensions change.  Moreover, what is passed to the Print dialog box is specific to 
the print driver.  For printers I had available, different drivers yielded the following:
  High  Wide  Printer / Driver
  3.63  6.50  *Original document in LO 7.4.2.3*
  3.08  3.63  Brother HL-L2360
  8.50 11.00  Epson XP-6100
  8.50 11.00  HP LaserJet 2200 (PCL5)
  6.50  5.50  KM C360 or C368 (PCL6 or PS)
  8.50 11.00  MS Windows Print to PDF
  3.63  6.50  MS Windows Fax [*THIS GETS IT RIGHT* and even identifies "#6 3/4 (Personal) Envelope"]
  3.63  6.50  MS XPS Document Writer [*THIS GETS IT RIGHT* (same as Fax)]
  8.00 11.00  OneNote

Bottom line: It's clearly possible to get this right, but rare; most printers/drivers tested got it 
wrong to in one way or another.  Of course this is not just about a particular envelope size, or 
even envelopes generally; it is clearly a paper size issue.  Bug 146213 (filed in Dec.2021 for LO 
6.3.0.4) traced a similar problem for B5 paper size. It was never assigned, so never resolved, so 
I'm trying to take a more systematic approach.  Is there a coherent way of thinking about this?

John

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