A2 Envelope Size Is Unavailable For Some Printers In Word

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Workaround

To create an A2 envelope in Office Word if you use a Hewlett-Packard OfficeJet printer, follow these steps:

On the File menu, click New.
In the New Document pane, click Blank Document.Note To create a blank document in Microsoft Office Word 2007, click the Microsoft Office Button, click New, and then click Blank document in the Blank and recent pane.
On the File menu, click Page Setup.Note To open the Page Setup dialog box in Word 2007, click Size in the Page Setup group on the Page Layout tab. Then, click More Paper Sizes.
On the Paper tab, in the Paper size box, click A2 Envelope (4.38 x 5.75 in).
On the Margins tab, under Orientation, click Landscape.
Click OK.