How to get the actual area rendered for a shape

tl;dr Curious if there is a method for ShapeStim that can give me the area of the shape that was rendered on the participant’s screen (particularly for the inbuilt shape star7).

Right now I have an experiment built in coder that generates different shapes (and numbers of shapes) at different sizes. I’m using the participant’s monitor height as my scaling unit. I’d like to be able to keep area constant across different shapes by scaling the size parameters but I’m not sure how to find the area for the inbuilt 7-sided star.

Sorry, I don’t know how to do that either, so no, it isn’t built in I’m afraid!