Getting pictures on shop page same size

Hi! I don’t know if this is possible, but if you click my link, I would like to change is to the following:

I would like for all the pictures to be the same size, as big as the ‘main’ picture, covering the whole page, and just leaving a little space on the right for buying and information etc.

Is this doable?

Hope so!

The page I need help with: [log in to see the link]