Monitoring Dataset size (Pro licence)

Hi 

I have a question regarding  size of  deployed datasets, please
As I have a PRO license, I have read that the size of my pbix file to deploy must not exceed 1 GB
But also that the size of my resulting dataset, which will refresh every day, must not exceed 1 GB
I guess the 1gb is based on the optimal compression rate each time (file compression + vertipaq compression)
The same compression base in a way
A question, where can I see the size of my dataset in my Workspace to check if it is not approaching 1 GB (... and a crash) ?

Thank you very much