I have decided to keep the category selection of my website more visual rather than text based. I will be displaying only top level categories on the sidebar and once the first cat is selected the next 2 levels deep will be selected by clicking on the category images, in a gallery style way. This all works fine as standard with s2 theme, however wanted to make my images larger and seem to be struggling. I have obviously gone into image setting and adjusted them however the images do not resize as expected, infact I can only seem to get them smaller. It seems as though the theme is set to display 6 images per row as this is always the case, so im thinking that this may be preventing me from enlarging my category images. I’m new to Opencart so hopefully there is no setting or option that I have simply missed.

http://websurveyor.co.uk/index.php?route=product/category&path=62