For that you have to upload all images as same size. if we set all grid fix same size then if you have any small image with product then image will starch.
Hello. Thanks for replying. I guess my question is to do with the images that are loaded by default when I create products. They do not appear to be square and so even if all the images I upload are the same, the ones that are provided automatically (which are still helpful to have) are different. Maybe if I could find out the dimensions of these images I could match my uploaded ones to them?