Whats the best size page to use in Microsoft word
What size book do you intend to publish? Whatever that is, that is the size of the page you should use in Word.
At the very beginning of the wizard you will find templates. You will probably need to greatly modify the templates to suit yourself, but the page sizes, at the very least, will be right.
Just look at the sizes in Create and set the Word file to that size (Page Layout - Page Size.) One problem with the template is that a lot of the defaults need to be adjusted, and people do not know how to, and by the time they have worked it out, they may as well have made their own template.
Myself and my friend combined know everything there is to know, but he's not here.