Card Collection with just 2 columns per row

I have created a card collection that is displaying some images. When I view the app on my desktop, it uses 3 columns per row but the images come out a little bit too small to make out some of the detail. Is there a way to force it to no more than 2 columns?

I think you can adjust the size of the card.

I have set the size of the card to XL. It still shows me 3 columns.