Chris:

I have a few dozen songs for which I've purchases sheet music over the years. I just measured them and they are all 9" x 12".

That's an awkward size, as most "home" inkjet printers are set up for "standard" letter-size (8-1/2" x 11") or legal-size (8-1/2" x 14") or something smaller.

In BIAB when I go to File > Print Songs - Chords/ Melody, then click the Setup Printer button, the Print Setup window that opens shows, as a default, my normal inkjet printer that is connected to my PC.

In the Paper > Size dropdown there is listed many different sizes. Mine doesn't show a "9 x 12" (unless it's called something obscure or is listed in metric).

I would contact your producer and ask for specific measurements.

Good luck!
LLOYD S