How to Change Paper Size in Word for Office 365

The steps in this article are going to show you how to change paper size in Word.

  • The default paper size for your Microsoft Word document is determined by your geographic location. The page size for new documents will be either letter paper size or A4 paper size.
  • ​The Page Setup menu in Microsoft Word lets you change the default settings for new documents. If you want to adjust Word so that all new documents are a different paper size, then the Page Setup menu is where to accomplish that.
  • You are able to select a custom paper size when selecting the new paper size. The Page Setup group in the ribbon also lets you adjust other settings, such as the document margins and the page orientation.
Yield: Changes the paper size in a Word document

How to Change Paper Size in Word

how to change paper size in Word

Learn how to change the paper size in Word if you need to use a different size paper for your document than what is currently set.

Prep Time 1 minute
Active Time 1 minute
Additional Time 1 minute
Total Time 3 minutes
Difficulty Easy


  • Word document


  • Microsoft Word


  1. Open your document.
  2. Click the Layout tab.
  3. Select the Size option.
  4. Choose the paper size.


If you click the More Paper Sizes option at the bottom of the list of page sizes, it will open a new window. On this Page Setup dialog box you will be able to set the default paper size in Word if you wish to use a different paper size for new documents that you create.

When you are creating a new document in Microsoft Word on your PC or Mac computer, there are certain settings that will apply to that document.

However, sometimes a document that you are working on needs some different settings, such as a different paper size.

Luckily Microsoft Office programs like Word and Excel provide options to change these settings. Our tutorial below will show you how to change the paper size in Microsoft Word if you need a page size that’s different than what is currently set.

How to Change Paper Size in Word

The steps in this article were performed in Microsoft Word for Office 365, but will also work in most other versions of Word, such as Word 2016 or Word 2019. In some older versions of Word there may be a Page Layout tab rather than a Layout tab.

Step 1: Open your document in Microsoft Word.

Step 2: Select the Layout tab at the top of the window.

click the Layout tab

Step 3: Click the Size button in the Page Setup group in the ribbon.

click the Size button

Step 4: Choose the desired page size from the options in the drop-down menu.

how to change paper size in Word

​Note that there is a More Paper Sizes option at the bottom of this menu where you can set a custom page size. If you choose that option it will open the Page Setup dialog box shown in the image below.

how to change the default paper size in Word

At the bottom of that Page Setup window is a button that says Set as Default. After making changes to options on this menu you can click that button if you would like to apply all of these changes to new documents that you create in the future. For example, if you wanted to make Legal the default paper size for new documents in Microsoft Word, you could choose it from the dropdown menu, then click the Set as Default button.

Learn about some helpful print settings to change in Microsoft Excel if you find that you often have trouble printing spreadsheets in that application.