Clear cache and check the result of custom CSS code.
I’ve checked page of Lotus Çiçeği Şekilli Ayarlanabilir Kadın Yüzük product on your site. Your images of products have different size. Please read this article – https://xstore.helpscoutdocs.com/article/89-product-images It is recommended to use a graphics editor and prepare product images (make them the same size) before uploading images to your media gallery.
