Making the shopify product modal image bigger

Shopify Apps
1

I am using the shopify buy button to embed a product catalog on my wordpress site. Is there any way to make the pictures that show up in the modal full-screen, or at least larger than how they appear on the catalog overview page? For what it’s worth, it seems like I can control some of the behavior of the modals with

            "modalProduct": {
              "contents": {
                "img": true,
                "fullScreen": true,
                "imgWithCarousel": false,
                "button": false,
                "buttonWithQuantity": true
              },

Looking through the code, it seems like width is a configurable option, and that could certainly be the missing element; however, setting various values for width doesn’t seem to have any effect.

Thanks.