Aspect ratio of the covers under grid view

Hello, I'm trying to set up my library with calibre. I use the grid view and I can't find a way to have all covers presented with the same size.
I'm able to do that unchecking "keep the aspect ratio of the covers" under cover navigation, but it doesn't work for the grid view. I've looked through all options and checked the manual but I really can't find a way.
If it is possible, does anyone know how?
OS: Debian 11
Calibre version: 6.12.0