Ось код php сайдбару, як зменьшити його ширину?

<?php

// Exit if accessed directly
if( !defined( 'ABSPATH' ) ) {
    exit;
}

/**
* Main Widget Template
*
*
* @file           sidebar.php
* @package        Responsive
* @author         Emil Uzelac
* @copyright      2003 - 2014 CyberChimps
* @license        license.txt
* @version        Release: 1.0
* @filesource     wp-content/themes/responsive/sidebar.php
* @link           http://codex.wordpress.org/Theme_Develo … bar.php.29
* @since          available since Release 1.0
*/

/*
* If this is a full-width page, exit
*/
if( 'full-width-page' == responsive_get_layout() ) {
    return;
}
?>

<?php responsive_widgets_before(); // above widgets container hook ?>
    <div id="widgets" class="<?php echo implode( ' ', responsive_get_sidebar_classes() ); ?>">
        <?php responsive_widgets(); // above widgets hook ?>

        <?php if( !dynamic_sidebar( 'main-sidebar' ) ) : ?>
            <div class="widget-wrapper">

                <div class="widget-title"><h3><?php _e( 'In Archive', 'responsive' ); ?></h3></div>
                <ul>
                    <?php wp_get_archives( array( 'type' => 'monthly' ) ); ?>
                </ul>

            </div><!-- end of .widget-wrapper -->
        <?php endif; //end of main-sidebar ?>

        <?php responsive_widgets_end(); // after widgets hook ?>
    </div><!-- end of #widgets -->
<?php responsive_widgets_after(); // after widgets container hook ?>