Resize Image Sizes

Looked through and tried a bunch of ways to accomplish this on the support board. None worked. Want to change the Square size to 250 250.

This is what I placed in the child theme functions.php:

<?php

/*
* Add your own functions here. You can also copy some of the theme functions into this file.
* WordPress will use those functions instead of the original functions then.
*/

// Add Custom sizes for Products
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’=>250, ‘height’=>250); // 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
}
add_action( ‘init’, ‘avia_change_image_size_array’);