Hello,

Thank you so much for contacting our support center.

Our theme has only one extra image size and if you want to disable it need to add the following code to the functions.php file in the child theme. All other sizes are registered by WordPress core and WooCommerce plugin. You can try to find some plugin to clean your Media folder from generated thumbnails.

add_action( 'after_setup_theme', 'woodmart_add_image_size' );

Kind Regards
XTemos Studio