cpt_image_sizes

    /**
	 * Add & remove image sizes from the "Image Sizes" panel
	 *
	 * @since 1.0.0
	 * source: https://wpexplorer-themes.com/total/snippets/addremove-image-sizes/
	 */	
    public static function cpt_image_sizes( $sizes ) {

        // Remove "blog_post_full" image size
        unset( $sizes['blog_post_full'] );
        
        // Add new image size "my_image_sizes"
        $sizes['cpt_image_size'] = array(
            'label'     => __( 'Image sizes for Slider Entry displays', 'wpex' ), // Label
            'width'     => 'cpt_image_size_width', // id for theme_mod width
            'height'    => 'cpt_image_size_height', // id for theme_mod height
            'crop'      => 'cpt_image_size_crop', // id for theme_mod crop
        );
        
        // Add new image size "my_image_sizes"
        $sizes['services_archive'] = array(
            'label'     => __( 'Image sizes for Archive Entry displays', 'wpex' ), // Label
            'width'     => 'archive_image_size_width', // id for theme_mod width
            'height'    => 'archive_image_size_height', // id for theme_mod height
            'crop'      => 'archive_image_size_crop', // id for theme_mod crop
        );

        // Return sizes
        return $sizes;

    }