Generate new image size thumb in functions.php (child theme)

Hi Supporters,

I am trying to generate new image sizes in a child theme. I have added this to the child theme functions.php file:

function avia_change_image_size_array() {
global $avia_config;
$avia_config['imgSize']['widget'] 	= array('width'=>36,  'height'=>36);	// small preview pics eg sidebar news
$avia_config['imgSize']['square']     = array('width'=>180, 'height'=>180);	         // small image for blogs
$avia_config['imgSize']['featured'] 	= array('width'=>1500, 'height'=>430 );		// images for fullsize pages and fullsize slider
$avia_config['imgSize']['featured_large']  = array('width'=>1500, 'height'=>630 );		// images for fullsize pages and fullsize slider
$avia_config['imgSize']['extra_large']  	= array('width'=>1500, 'height'=>1500 , 'crop' => false);	// images for fullscrren slider
$avia_config['imgSize']['portfolio'] 	= array('width'=>495, 'height'=>400 );				// images for portfolio entries (2,3 column)
$avia_config['imgSize']['portfolio_small'] 	= array('width'=>260, 'height'=>185 );			// images for portfolio 4 columns
$avia_config['imgSize']['gallery'] 	= array('width'=>845, 'height'=>684 );			// images for portfolio entries (2,3 column)
$avia_config['imgSize']['magazine']  = array('width'=>710, 'height'=>375 );						// images for magazines
$avia_config['imgSize']['masonry'] 	= array('width'=>705, 'height'=>705 , 'crop' => false);		// images for fullscreen masonry
$avia_config['imgSize']['entry_with_sidebar'] 	= array('width'=>845, 'height'=>321);	           	// big images for blog and page entries
$avia_config['imgSize']['entry_without_sidebar']= array('width'=>1210, 'height'=>423 );		// images for fullsize pages and fullsize slider
$avia_config['imgSize']['door-thumb'] 	= array('width'=>133, 'height'=>200 , 'crop' => false);	// small preview for Doors
$avia_config['imgSize'] = apply_filters('avf_modify_thumb_size', $avia_config['imgSize']);

$avia_config['selectableImgSize'] = array(
	'square' 				=> __('Square','avia_framework'),
	'featured'  			=> __('Featured Thin','avia_framework'),
	'featured_large'  		=> __('Featured Large','avia_framework'),
	'portfolio' 			=> __('Portfolio','avia_framework'),
	'gallery' 				=> __('Gallery','avia_framework'),
	'entry_with_sidebar' 	=> __('Entry with Sidebar','avia_framework'),
	'entry_without_sidebar'	=> __('Entry without Sidebar','avia_framework'),
	'extra_large' 			=> __('Fullscreen Sections/Sliders','avia_framework'),
	'door-thumb' 	        => __('Door Thumb','avia_framework'),
	
);
}
add_action( 'init', 'avia_change_image_size_array');

but the one I added which is door-thumb in the last row doesn’t appear in the image size list.

Please advice,

Thanks,