PAGE_SIZE=logical-size

    This parameter specifies the size of the logical page. Valid values are:

                 A0                  DOUBLEPOSTCARD
                 A1                  EXECUTIVE
                 A2                  FOLIO
                 A3                  LEGAL
                 A4                  LETTER (same as A)
                 A5                  LEDGER (same as B)
                 B4                  HALFLETTER
                 B5                  TWOTHIRDSA4
                 B6                  7_ENVELOPE
                 C                   9_ENVELOPE
                 D                   9X12_ENVELOPE
                 E                   10X13_ENVELOPE
                 7X9                 BUSINESS_ENVELOPE
                 10X14               C4_ENVELOPE
                 11X14               C5_ENVELOPE
                 12X19.5             C6_ENVELOPE
                 13X19               DL_ENVELOPE
                 FOOLSCAP            SPFOLIO
                                     UKQUARTO

    Specifying a PAGE_SIZE value in conjunction with the SHEET_SIZE
    value is useful for scaling pages to fit a different size of media
    than that for which they were formatted.

    If you do not specify SHEET_SIZE in your PRINT command, the PAGE_SIZE
    value is assumed to be the physical sheet size as well.  In a print job
    where both PAGE_SIZE and SHEET_SIZE are not specified, the DECprint
    Supervisor software assumes the size of the media that is loaded into
    the default input tray.