Woocommerce 缩小商业电子邮件的图像

我将以下代码放入函数中，以在商业订单电子邮件上显示图像。不幸的是，图像太大了。如何减少

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function sww_add_wc_order_email_images( $table, $order ) {

ob_start();

$template = $plain_text ? 'emails/plain/email-order-items.php' : 'emails/email-order-items.php';
wc_get_template( $template, array(
    'order'                 => $order,
    'items'                 => $order->get_items(),
    'show_download_links'   => $show_download_links,
    'show_sku'              => $show_sku,
    'show_purchase_note'    => $show_purchase_note,
    'show_image'            => true,
    'image_size'        => array( 100, 50 ),
    'image_size'            => $image_size
) );

return ob_get_clean();
}
add_filter( 'woocommerce_email_order_items_table', 'sww_add_wc_order_email_images', 10, 2 );