A paper comes in many sizes. Most business correspondences make use of the papers with 8.5 by 11 sizes. This is the default page size in Microsoft Word.
Size Option: If the user is now using the 8 1/2 by 11 paper size, then he can make use of the 'Size' option in the 'Page Setup' group of the 'Page Layout' tab for changing the 'Size' setting to any required size.
How to open corrupt word Docx file? Docx File Recovery Tool gives advanced repair utility to repair and recover damaged Docx files.