Select a custom paper size (Mac OS X)
1.
On the File menu, click the Print option.
2.
In the Printer menu, select this product.
3.
In the Copies & Pages menu, click the Page Setup button.
4.
From the Paper Size drop-down list, select the Manage Custom Sizes option.
5.
Specify the dimensions for the page size, and then click the OK button.
6.
Click the Print button.