Sidebar Width

Hi,

I’ve based by site-design on Kriesi’s “Small Business – Flat Demo”. I want to make my sidebar smaller and followed the instructions provided here:
https://kriesi.at/support/topic/changing-the-sidebar-width-and-keeping-it-responsive/

I’ve added the following to the child theme. Making it smaller by one unit works fine.

$avia_config['layout']['fullsize'] 		= array('content' => 'twelve alpha', 'sidebar' => 'hidden', 	 'meta' => 'two alpha', 'entry' => 'eleven');
$avia_config['layout']['sidebar_left'] 	= array('content' => 'nine', 		 'sidebar' => 'three alpha' ,'meta' => 'two alpha', 'entry' => 'nine');
$avia_config['layout']['sidebar_right'] = array('content' => 'nine alpha',   'sidebar' => 'three alpha', 'meta' => 'two alpha', 'entry' => 'nine alpha');

But going smaller by one more unit, nothing changes:

$avia_config['layout']['fullsize'] 		= array('content' => 'twelve alpha', 'sidebar' => 'hidden', 	 'meta' => 'two alpha', 'entry' => 'eleven');
$avia_config['layout']['sidebar_left'] 	= array('content' => 'ten', 		 'sidebar' => 'two alpha' ,'meta' => 'two alpha', 'entry' => 'ten');
$avia_config['layout']['sidebar_right'] = array('content' => 'ten alpha',   'sidebar' => 'two alpha', 'meta' => 'two alpha', 'entry' => 'ten alpha');

Haven’t added any custom css.
Can you please help?