Add product attributes underneath the product title on an order form from Order Form for WooCommerce. Requires version 1.0.5 or higher. Save this file as a simple plugin in the WordPress plugins folder. http://orderform-woo.webaware.net.au/

order-form-woo-attrs.php

<?php
/*
Plugin Name: Order Form for WooCommerce Product Attributes
Plugin URI: https://gist.github.com/webaware/931c8c216a90a16b9c62
Description: add product attributes to Order Form for WooCommerce product
Author: WebAware
Author URI: http://webaware.com.au/
*/

if (!defined('ABSPATH')) {
    exit;
}

/**
* add product attributes to Order Form for WooCommerce product
* @param WC_Product $product
* @param array $attrs
*/
add_action('orderform_woocommerce_order_item_end', function($product, $attrs) {

    $attributes = $product->get_attributes();

    foreach ($attributes as $attribute) {
        // must be ticked as visible
        if (empty($attribute['is_visible'])) {
            continue;
        }

        // must not be a variation
        if (!empty($attribute['is_variation'])) {
            continue;
        }

        if (empty($attribute['is_taxonomy'])) {
            // attribute values stored locally on the product
            $class = strtolower(sanitize_title($attribute['name']));
            $label = $attribute['name'];
            $values = explode('|', $attribute['value']);
            $values = array_map('trim', $values);
        }
        else {
            // global product attributes, stored as terms of a taxonomy
            $taxonomy = get_taxonomy($attribute['name']);
            $class = sanitize_title($taxonomy->name);
            $values = wp_get_post_terms($product->id, $taxonomy->name, array('fields' => 'names'));

            // get tax label
            if (isset($taxonomy->labels->name)) {
                $label = $taxonomy->labels->name;
            }
            elseif (isset($taxonomy->label)) {
                $label = $taxonomy->label;
            }
            else {
                $label = $taxonomy->name;
            }
        }

        printf('<p class="attribute-%s"><strong>%s</strong><br />', esc_attr($class), esc_html($label));
        $separator = '';
        foreach ($values as $value) {
            printf('%s<span>%s</span>', $separator, esc_html($value));
            $separator = '<br/>';
        }
        echo "</p>\n";
    }

}, 10, 2);