/SIZE[=option]
       /NOSIZE (default)

    Displays the size in blocks of each file. If you omit the option
    parameter, the default lists the file size in blocks used (USED).
    Specify one of the following options:

    ALL           Lists the file size both in blocks allocated and
                  blocks used.

    ALLOCATION    Lists the file size in blocks allocated.

    UNITS[=option]Allows you to override the current default
                  specified by SET PROCESS/UNITS so that you can
                  display file size in your choice of blocks or
                  bytes.

                  The following keywords are valid options with the
                  UNITS keyword: BLOCKS, BYTES.

                  If you specify UNITS with no option, the default
                  value is not changed.

    USED          Lists the file size in blocks used.

    The size of this field can be altered by supplying the size value
    of the /WIDTH qualifier.