Hello, @VroH,
You may delete Product Images Width and Height in Theme Option, then go to Woocommerce > Settings > Products > Display and change Product Image settings.Then regenerate thumbnails with the plugin https://wordpress.org/plugins/regenerate-thumbnails/ Also, I would recommend you upload images with similar sizes. Read more about image size – https://docs.woocommerce.com/document/fixing-blurry-product-images/ (please note that zoom effect shows the real size of images).
Regards
