Front - APP Marketplace - Change Listing Image Size

functions.php

if ( ! function_exists( 'front_hp_template_single_listing_image' ) ) {
    /**
     * Output the listing image
     * Image Size: 450x450-crop
     */
    function front_hp_template_single_listing_image( $listing ) {
        if ( has_post_thumbnail() ) {
            ?><div class="text-center mx-auto mb-3"><?php
                $img_sz_name = front_get_image_size( 'blog_agency_thumbnail_2', 'post-thumbnail' );
                the_post_thumbnail( $img_sz_name, array( 'class' => 'img-fluid' ) );
            ?></div><?php
        }
    }
}