/SIZE=keyword

    Allows you to override the current default specified by SET
    PROCESS/UNITS so that you can display disk free space in your
    choice of blocks or bytes. (/SIZE is functionally equivalent to
    /UNITS.)

    The following keywords are valid with the /SIZE qualifier:
    BLOCKS, BYTES.

    If you specify /SIZE with no keyword, the default value is not
    changed.

    Note that you cannot use the /SIZE qualifier with the /FULL
    qualifier.