Hello @roomaromas,

To display only three product in related product section you have to create and activate the child theme.

Child theme references:
https://codex.wordpress.org/Child_Themes

You can also create the child theme using plugin:
https://wordpress.org/plugins/wp-child-theme-generator/

After activating the child theme in your child themes functions.php include below given code:

add_filter( 'woocommerce_output_related_products_args', 'clean_commerce_child_related_products_args' );
  /**
   * [clean_commerce_child_related_products_args Woo related Products Fix]
   * @param  [type] $args [array]
   * @return [type]       [array]
   */
  function clean_commerce_child_related_products_args( $args ) {
	$args['posts_per_page'] = 3; // 3 related products
	return $args;
}

We are not very clear on your second query i.e. “size of the category icons and the product icons” so please send the proper screen shot of the issue so we could provide precise fix .

Hope this helps.

Best Regards!!

Hello @roomaromas,

Please try Regenerating thumbnails using the plugin like given below:

https://wordpress.org/plugins/regenerate-thumbnails/

If this does not solve the issue, please kindly let us know.

Best Regards!!

Hello @roomaromas,

Nice to know that your issue is solved .

If your are having difficulty in re setting the customizer after activating the child theme then please include the below given code in your child themes functions.php .

function clean_commerce_child_customizer_options_import() {

if ( get_stylesheet() !== get_template() ) {
   add_filter( 'pre_update_option_theme_mods_' . get_stylesheet(), function ( $value, $old_value ) {
        update_option( 'theme_mods_' . get_template(), $value );
        return $old_value; // prevent update to child theme mods
   }, 10, 2 );
   add_filter( 'pre_option_theme_mods_' . get_stylesheet(), function ( $default ) {
       return get_option( 'theme_mods_' . get_template(), $default );
   } );
}
}

add_action('init', 'clean_commerce_child_customizer_options_import');

This code will allow all the setting of parent theme to be in the child theme so you don’t have to re enter the settings .

Hope this helps.

Best Regards!!

Hello @roomaromas,

We are very glad that we could help you with your issues .

If you have any query further we are always here for you.

Best Regards!!