Problem with custom Shop Image Sizes

Dear Community,
i’m working with woocommerce and storefront, created a child theme and now have a problem.
I want to change the image sizes of products.
Therefore i found an woocommerce article, how to hardcode filesizes:

add_theme_support( 'woocommerce', array(
    'thumbnail_image_width'         => 200,
    'gallery_thumbnail_image_width' => 100,
    'single_image_width'            => 500,
) );

But after regenerating the thumbnails, all images have the same size?
In the Theme-Customizer, i can just change the aspect ratio of the image, in my case 1:1.
also without the showing code below. so there must be hardcoded the sizes.
but where can i find them? and how to override them in a child theme?

thank you in advance!