Library /sys$common/syshlp/tcpip$ucp_help.hlb CREATE, CONTAINER, Qualifiers, /SIZE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /SIZE=option=value

    Optional. Default: /SIZE=(INITIAL=8917,EXTEND=160,MAXIMUM=0).

    Specifies the following file size attributes:

    o  INITIAL

       Specifies the initial size, in OpenVMS blocks, of the
       container. Maximum value: 8917.

    o  EXTEND

       When an extension is necessary, specifies the number of blocks
       by which the container is extended. Maximum value: 8192.

                                      NOTE

          Using large values might impact system performance and
          disk usage. In most cases, the default is sufficient.

    o  MAXIMUM

       Specifies the maximum size of the container.

       If the value is zero, the size of the container file can
       increase without limits.