Disk Space Requirements for Non-Global Zones
When installing the global zone, be sure to  reserve enough disk space
for all of the zones you might create. Each non-global zone might
have unique disk space requirements. 
No limits are placed on how much disk space can be consumed
by a zone.  The global zone administrator is responsible for space restriction.
 Even a small uniprocessor system can support a number of zones running
simultaneously.  The characteristics of the packages installed in the global zone affect
the space requirements of the non-global zones that are created.  The number
of packages and space requirements are factors.
For complete planning requirements and recommendations, see Chapter 18, Planning and Configuring Non-Global Zones (Tasks), in System Administration Guide: Solaris Containers-Resource Management and Solaris Zones.