Grid Zoom

Helo,

I have the requirement to make one specified grid (among others) in our web application a bit smaller in overall to be able to display more content.

I am currently trying to figure out a way to do this, but right now I only have the CSS “Zoom”-Property on my mind.
After trying it out (and reading up) it
seems
to only work on Chrome, unfortunately not Firefox & IE and additionally is one of the CSS attributes mostly declared as “Do not use!”.

Has someone some other idea on how this could be accomplished?

PS: Changing the base-size in the theme SASS-properties is not possible, as everything else should stay the size it is, only this one grid should shrink.

Thank you already!