How do we re-configure size width in the Container component, in v7.

[dry yarrow]

I have recently migrated my project to v7. I had added custom size for Container size props. How do i do the same thing in v7.
Here is what my initial theme props looked like

, need to do something similar on my v7

here is the recent one, did look into the documentation for it, but i am genuinely confused

[jade pond]

You can do that with components CSS variables – https://v7.mantine.dev/styles/styles-api#components-css-variables