[Plugin: Woocommerce] Making catalog images larger but on the same row

I’ve been stumped by this one. I’ve been trying to make the images in my catalog larger, but whenever I do so via CSS it only seems able to support two images per row, even though there appears to be much more than enough space left to allow for more images per row. I’ve toyed with margins, padding, width, display, etc. but nothing seems to work.