sphinx-design: how to scale SVG images when embedded in a (grid-item) card

[HealthyPear]

I am experimenting by trying to reproduce the style shown in pandas (https://pandas.pydata.org/docs/) with sphinx-design (they are using sphinx-panels).

I tried downloading one of their icons (but also with any free favicon is the same) and I can't seem to understand how to scale its size: right now I see this

In sphinx-panels this is done by using the class (though the pandas guys don't do it so I am not sure)

:img-top-cls: pl-5 pr-5

this I don't seem to find this available in sphinx-desing - perhaps it has a different name?