[Quoth]

export to RTF, docx, doc etc, something a wordprocessor understands.
Then set the page size in a Wordprocessor.
You'll want at least two or three styles of page. Front matter, body, rear matter.
Setup headers and footers etc.
Check all the styles, fonts and layout suit paper.
Export / Save As PDF.
Older versions of Word need a plugin.
LibreOffice from 5.x and later produce very good PDFs

BTW, the ONLY use for a PDF of a novel is for Print on Demand. The epub is far superior as an eBook. PDFs are not eBooks, but either preview for print or a file for someone else to print. Portable Document Format.
Note that paper prints and paper publishing need typically 300 dpi images at an actual size for the size of book. Traditionally ebooks use lower resolution and smaller images.