What font and size do I use

I'm guessing you mean pasting from Word into a forum message?

Why not use the board's default font & size? Just don't specify another font or size.

It's likely that formatting codes will be lost if you copy/paste into the forum message editor directly from Word, and your text may look screwed up.

Try copy/pasting into Notepad first (or similar dumb text editor), and tidy up your text there, e.g. insert blank lines between paragraphs, before copy/pasting from Notepad into the forum message editor window.

Also, take a peek at this thread from Michael Parks, who has provided a downloadable text reformat utility:
http://absolutewrite.com/forums/showthread.php?t=96696

-Derek

Or run Wordpad, do new document, and choose text document. Write your text in that, then copy/paste it into the forum.

Wordpad and notepad are much "lighter weight" programs that Word, so you don't have to wait three seconds for the to run or do some "big operation." I stay away from Word (and the OpenOffice writer application) as much as I can.

The forum's default font will be the most reader-friendly. Please consider that. Please. Please.