Front - Portfolio - Change Portfolio Classic Image Size

functions.php

if ( ! function_exists( 'front_portfolio_classic_content' ) ) {
    function front_portfolio_classic_content() {
        /**
         * Image Size: 450x450-crop
         */
        $img_sz_name = front_get_image_size( 'portfolio_profile_thumbnail_4', 'post-thumbnail' );
        the_post_thumbnail( $img_sz_name ); 
        $enable_portfolio_author = apply_filters( 'front_portfolio_enable_author', true ); ?>
        <div class="py-3">
            <h4 class="h6 text-dark mb-0"><?php the_title(); ?></h4>
            <?php if ( $enable_portfolio_author == true ): ?>
                <p class="small mb-0"><?php echo sprintf( esc_html__( 'by %s', 'front' ), front_loop_portfolio_author() ); ?></p>                
            <?php endif; 
            front_portfolio_post_excerpt(); ?>
        </div><?php
    }
}