If you have an Ève account, log in to see your current orders where you'll find the order number. If you didn't create an account, it's not a problem! You can set one up anytime using the same email address you used for the order.
Keep in mind, every time an order is placed, we send a confirmation email (including the order number) to the email address used for the purchase. Do check all your email folders, including junk/spam, as it might have ended up there!