LibreOffice reduces printed size of .doc on saving

I had previously used LibreOffice successfully and saved all documents as
.doc. However, after (I think) v. 5.1, when I saved a document as .doc, and
later reopened it, it would not print the same size as it displayed, and
instead printed much smaller. This behavior does not appear when I save as
.odt. The document looks normally, but looks much smaller in the print
preview and in the print dialog. I would prefer not to have to use .odt all
the time, as I will have to do a lot more conversion.
Can anyone help resolve this issue?