How to adjust the margin in the outline?

Hi, I have modified the width of the images in the outline to 236px and height 354px in the photos module. Now the margin in the outline gets too width, so I don't know where to edit it and in which file? Any help is appreciated. Beforehand Thanks!

My website is: http://buddygalaxy.com/

I don't know if this is what your looking for but you can try to mess with the settings in:

modules/boonex/wall/js/outline.js

Near the top:

    $(document).ready(function() {
        $('#bx-wall-outline .wall-outline-items').masonry({
          itemSelector: '.wall-oi-item',
          columnWidth: 160,
          gutterWidth: 21
        });
    });
}

outline css is your best option

Thank you so much guys. I have already found a solution. But, again thanks for your helps. Bye!