My products have different heights

Hello,

In general, the issue with the images themselves, they should have equal dimensions by default. Here is our article about image sizes – https://xtemos.com/docs-topic/image-size-and-content-alignment-in-a-product-grid/

Also, after setting the sizes you want, you can regenerate images – https://wordpress.org/plugins/regenerate-thumbnails/ but it does not always work.

https://www.wpbeginner.com/plugins/regenerate-thumbnails-new-image-sizes-wordpress/

Kind Regards