This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
Probably size of instances of a class is always -1.
It's not possible to retrieve the size from debuggee. This is why we do not show this column by default. Perhaps we should somehow remove the column completely...
Accepted, but will not be fixed for NB 6 -- there is an unimplemented RFE on JDI to provide this info.
Size shows N/A in NB 6.8.