Command line Interface: size option

[CehLyHuns]

I use DrawIO to import VISIO files and extract them in SVG and XML format. However, with the Desktop version, I use the size=page option so that these two files have the same origin.
I need to automate this process, so I use the CLI. But in the CLI, I can't find the size=page option. I've tried a multitude of options, but nothing works. Do you know how to extract a file in size=page with the CLI?