I have found 1 product on the single product page where the container width for the product picture is not the correct theme default size. Picture default size in Woo Commerce is 400×400. The container in the other product pictures is 611×400. But in this page the container is too narrow, only the width of the picture and it shows 397×397. Please see https://www.exteriorcoatings.com/shop/6007-concrete-steel-epoxy-for-wet-conditions/
I haven’t of course gone through every product page to see if there are any others, but if there is one you can bet……….