recuperer les characteristic dans email

a:2:{i:0;O:8:"stdClass":8:{s:25:"variant_characteristic_id";s:1:"2";s:18:"variant_product_id";s:3:"516";s:8:"ordering";s:1:"0";s:17:"characteristic_id";s:1:"2";s:24:"characteristic_parent_id";s:1:"3";s:20:"characteristic_value";s:6:"13.7 m";s:20:"characteristic_alias";s:0:"";s:23:"characteristic_ordering";s:1:"0";}s:10:"7m / 13.7m";s:6:"13.7 m";}

$ch = $item->order_product_options[0]->characteristic_value;
$ch_result = $item->order_product_quantity . ' x ' . $ch;


$cartProduct = array(
			'PRODUCT_CODE' => $item->order_product_code,
			'PRODUCT_QUANTIY' => $ch_result,
			'PRODUCT_IMG' => '',
			'item' => $item,
			'product' => $product,
		);