Make portfolio item container bigger so photo doesn't get cropped

I’m using square photos in my portfolio and when you click on the image to open the portfolio item page it still shows the image cropped on top and bottom. Where can I change the code so it shows the entire image rather than cropping off the top and bottom? I tried going in to the theme editor and changing the following line from
$avia_config[‘imgSize’][‘portfolio’] = array(‘width’=>495, ‘height’=>400 ); to
$avia_config[‘imgSize’][‘portfolio’] = array(‘width’=>495, ‘height’=>495 );

hoping this square dimension would fix the problem but it didn’t change anything.