Preview image padding?

Is it possible to add image padding to preview images (in my case in a cards layout)? I have some sponsor logos that are of very different aspect ratios and I don’t want them to cover the whole preview image box. But by default one dimension always hits the very edge of the image box which doesn’t look good, so I’d like a little padding on all sides.

You could add padding via a custom panel stylesheet.

OK, I was hoping there was a blueprint setting for that but that’s also an option. Thanks.