For Microsoft Office Word 2007/2010/2013
* On Page Layout tab, click Size/More Paper Sizes option under Size to get the following dialogue, click on paper tab
Set your required paper size (A4 in this case) in there.
Then don’t forget to click on Default button on the left bottom corner, you will get a, as shown above. Select Yes. And you are done.
From now on, you’ll get default page size as A4, when you open MS Office word.
To change default font:
Style Name: Normal
Change as needed
click New document based on this template