Go to Settings > Devices > Printers and Scanners > click on your printer and click on the Manage button. When the new windows opens, click on Printing Preferences. That's where you select your default paper size.
Click Start, point to Settings, and the click Printers. Right-click the appropriate printer, and then click Properties. Click the Paper tab, and then click the paper size you want to use in the Paper Size box. Click OK, and then close the Printers folder.
The default paper size in Word depends on the Windows regional settings when Office was originally installed. In the US it's Letter Size (8.5” x 11” / 21.59 x 27.94cm), but in most of the world it's the metric A4 paper (8.27” x 11.69” / 21 x 29.7cm).
How do I permanently change the paper size in Word?
On the File menu, click Page Setup. In Page Setup, select a size from the Paper Size list. If you select Manage Custom Sizes from the list, you can define a custom paper size; click the plus sign to create a new paper definition, and then enter sizes for width, height, and non-printable area.
The most popular formats of the traditional sizes are the Letter (8.5 × 11 inches), Legal (8.5 × 14 inches) and Tabloid (11 × 17 inches) formats. You more than likely use these formats in your everyday life. Letter is the standard for business and academic documents.
How to Change Paper Size and Page Orientation in Word
Click the Layout tab.
Click the Size button.
Select the size you want to use. If the size you want to use doesn't appear in the list, select More Paper Sizes. The Paper tab of the Page Setup dialog box appears, where you can enter a custom paper size.
You can access the printer properties to view and change product settings.
Do one of the following: Windows 10: Right-click and select Control Panel > Hardware and Sound > Devices and Printers. Right-click your product name and select Printer properties. ...
Click any tab to view and change the printer property settings.
In the US, Word's default paper size is Letter (8.5 x 11 inches / 21.59 x 27.94 cm). If you use a different paper size more, though, you can change this: Go to Layout > Size > More Paper Sizes on the main ribbon. Select a paper size from the dropdown menu (or enter custom values).
