Oki ES 1624n MFP - Manual (Page 166)

Windows: PCL Emulation Driver • 166
6. User Defined Size appears in the Size list.
7. Select the tray you will be using in the Source drop-down list
under Media , then click OK .
8. Windows 98/Me/NT4.0: click OK .
Windows XP: click Print .
NOTE
To save the setting for future use:
• Click
Paper Feed Options , then click Custom Size .
• Select the unit, then enter the relevant information
for Width and Height and give your custom size a
name under Name .
• Click Add .
• Click OK.
The Custom Page Size is added to the bottom of
the Paper Size list.