The product and categories images are controlled by WooCommerce and our theme doesn’t influence them. WooCommerce provides some settings for the images that you can find under Appearance >> Customize >> WooCommerce >> Product Images.
Thank you very much, but in this case the image of the products is not uniform. How would it be fair to be? If the image of the products is 1000×800 on average.
I saw the screenshot you attached. As I mentioned in my previous reply the images are controlled by WooCommerce and the settings you made will work for both product images and categories images.
In case you are using images of different sizes you can set the main image thumbnail width from Appearance >> Customize >> WooCommerce >> Product Images.
And set the cropping to 1:1 then the images will be cropped in a ratio of 1:1.