function sww_add_images_woocommerce_emails( $output, $order ) {

// set a flag so we don't recursively call this filter

static $run = 0;

// if we've already run this filter, bail out

if ( $run ) {

return $output;

}

$args = array(

'show_image' => true,

'image_size' => array( 100, 100 ),

);

// increment our flag so we don't run again

$run++;

// if first run, give WooComm our updated table

return $order->email_order_items_table( $args );

}

add_filter( 'woocommerce_email_order_items_table', 'sww_add_images_woocommerce_emails', 10, 2 );