auto size images on product/category listing

With responsive Joomla! templates I sometimes add class="size-auto" in the <img> tag. Is it possible to incorporate this class (or similar) to auto-resize images on a category or products listing page? In my particular case, I'm not looking to specify this page by page, but for all listings (and not on the product display page; the lightbox works great for that).

Thanks,
Dave

Hi,

I think that you should probably use some CSS code like media queries and resize your product images regarding the size of the window.