protected function get_mapping_options( $item = '' ) {
		// Get index for special column names.
		$index = $item;

		if ( preg_match( '/\d+/', $item, $matches ) ) {
			$index = $matches[0];
		}

		// Properly format for meta field.
		$meta = str_replace( 'meta:', '', $item );

		// Available options.
		$weight_unit    = get_option( 'woocommerce_weight_unit' );
		$dimension_unit = get_option( 'woocommerce_dimension_unit' );
		$options        = array(
			'id'                 => __( 'ID', 'woocommerce' ),
			'type'               => __( 'Type', 'woocommerce' ),
			'sku'                => __( 'SKU', 'woocommerce' ),
			'name'               => __( 'Name', 'woocommerce' ),
			'published'          => __( 'Published', 'woocommerce' ),
			'featured'           => __( 'Is featured?', 'woocommerce' ),
			'catalog_visibility' => __( 'Visibility in catalog', 'woocommerce' ),
			'short_description'  => __( 'Short description', 'woocommerce' ),
			'description'        => __( 'Description', 'woocommerce' ),
			'price'              => array(
				'name'    => __( 'Price', 'woocommerce' ),
				'options' => array(
					'regular_price'     => __( 'Regular price', 'woocommerce' ),
					'sale_price'        => __( 'Sale price', 'woocommerce' ),
					'date_on_sale_from' => __( 'Date sale price starts', 'woocommerce' ),
					'date_on_sale_to'   => __( 'Date sale price ends', 'woocommerce' ),
				),
			),
			'tax_status'         => __( 'Tax status', 'woocommerce' ),
			'tax_class'          => __( 'Tax class', 'woocommerce' ),
			'stock_status'       => __( 'In stock?', 'woocommerce' ),
			'stock_quantity'     => _x( 'Stock', 'Quantity in stock', 'woocommerce' ),
			'backorders'         => __( 'Backorders allowed?', 'woocommerce' ),
			'low_stock_amount'   => __( 'Low stock amount', 'woocommerce' ),
			'sold_individually'  => __( 'Sold individually?', 'woocommerce' ),
			/* translators: %s: weight unit */
			'weight'             => sprintf( __( 'Weight (%s)', 'woocommerce' ), $weight_unit ),
			'dimensions'         => array(
				'name'    => __( 'Dimensions', 'woocommerce' ),
				'options' => array(
					/* translators: %s: dimension unit */
					'length' => sprintf( __( 'Length (%s)', 'woocommerce' ), $dimension_unit ),
					/* translators: %s: dimension unit */
					'width'  => sprintf( __( 'Width (%s)', 'woocommerce' ), $dimension_unit ),
					/* translators: %s: dimension unit */
					'height' => sprintf( __( 'Height (%s)', 'woocommerce' ), $dimension_unit ),
				),
			),
			'category_ids'       => __( 'Categories', 'woocommerce' ),
			'tag_ids'            => __( 'Tags (comma separated)', 'woocommerce' ),
			'tag_ids_spaces'     => __( 'Tags (space separated)', 'woocommerce' ),
			'shipping_class_id'  => __( 'Shipping class', 'woocommerce' ),
			'images'             => __( 'Images', 'woocommerce' ),
			'parent_id'          => __( 'Parent', 'woocommerce' ),
			'upsell_ids'         => __( 'Upsells', 'woocommerce' ),
			'cross_sell_ids'     => __( 'Cross-sells', 'woocommerce' ),
			'grouped_products'   => __( 'Grouped products', 'woocommerce' ),
			'external'           => array(
				'name'    => __( 'External product', 'woocommerce' ),
				'options' => array(
					'product_url' => __( 'External URL', 'woocommerce' ),
					'button_text' => __( 'Button text', 'woocommerce' ),
				),
			),
			'downloads'          => array(
				'name'    => __( 'Downloads', 'woocommerce' ),
				'options' => array(
					'downloads:name' . $index => __( 'Download name', 'woocommerce' ),
					'downloads:url' . $index  => __( 'Download URL', 'woocommerce' ),
					'download_limit'          => __( 'Download limit', 'woocommerce' ),
					'download_expiry'         => __( 'Download expiry days', 'woocommerce' ),
				),
			),
			'attributes'         => array(
				'name'    => __( 'Attributes', 'woocommerce' ),
				'options' => array(
					'attributes:name' . $index     => __( 'Attribute name', 'woocommerce' ),
					'attributes:value' . $index    => __( 'Attribute value(s)', 'woocommerce' ),
					'attributes:taxonomy' . $index => __( 'Is a global attribute?', 'woocommerce' ),
					'attributes:visible' . $index  => __( 'Attribute visibility', 'woocommerce' ),
					'attributes:default' . $index  => __( 'Default attribute', 'woocommerce' ),
				),
			),
			'reviews_allowed'    => __( 'Allow customer reviews?', 'woocommerce' ),
			'purchase_note'      => __( 'Purchase note', 'woocommerce' ),
			'meta:' . $meta      => __( 'Import as meta data', 'woocommerce' ),
			'menu_order'         => __( 'Position', 'woocommerce' ),
		);

		return apply_filters( 'woocommerce_csv_product_import_mapping_options', $options, $item );
	}