You can create up to 8 custom paper sizes and add them to the Paper 
Size list. This is useful if you’re printing a custom size document, such as 
a banner. You can select any width from 3.5 to 9.5 inches, and any height 
(length) from 3.5 to 44 inches.
1 Open your application’s File menu and select Page Setup.
2 Click the Customize button. You see the following dialog box:
3 Click the New button. Width and Height fields and Inches and cm 
radio buttons appear on the screen.
4 Type the width and length of your custom paper in the Width and 
Height fields. If you need to change from inches to centimeters, click 
the cm radio button.
5 Type a name for your paper size in the New Paper Size field, then 
click OK. The name is added to the Paper Size list and selected as the 
current setting in the Page Setup dialog box. 
6 Click OK to return to the Page Setup dialog box.
To delete a custom 
paper size, click the 
Customize button. 
Then click the name 
of the custom paper 
size and click Delete.