Default resolution of an SBSAR

Is there a correct way to check the default resolution on a mystery SBSAR with no origin, info text or metadata?

In this case the SBSAR output is probably set to Relative to Parent so it is adjustable dynamically when brought in to another Substance graph.
Wanted to find out if there is a better way than simply changing the Parent graph size and eyeballing the SBSAR output to see if it stops changing at a certain resolution?