Hello,

Sorry for the early confusion!

Try to change images size to at least 400 px in Appearance -> Customize -> WooCommerce -> Product images and regenerate all thumbnails.

You can find the sizes used on the demo here: https://xtemos.com/docs/woodmart/faq-guides/image-size-content-alignment-product-grid/

If you have any questions feel free to contact us.

Best Regards.