Portfolio preview 200×200 px with fixed size

Hello!

My old site had all preview images of portfolio works with size of 200×200 pixels.

So now I want to disable resizing of images in Enfold theme(it will allow mу to use old preview images).

All prewiew images shoud have the size of 200×200, no matter what size the browser have.

I think I shoud change something in the functions.php

$avia_config['imgSize']['widget'] 			 	= array('width'=>36,  'height'=>36);						// small preview pics eg sidebar news

$avia_config['imgSize']['entry_with_sidebar'] 	= array('width'=>710, 'height'=>270);		                 // big images for blog and page entries

$avia_config['imgSize']['entry_without_sidebar']= array('width'=>1030, 'height'=>360 );						// images for fullsize pages and fullsize slider

$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']['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'=>710, 'height'=>575 );						// images for portfolio entries (2,3 column)

Or may be theris a way to simply disable this function(but in other occasions resize shoud work)?