It means that there is only one size available for the item, generally a medium size to fit the majority of customers. However, please note that a Medium in China is approximately a Small in Europe/USA.
If you choose the Credit Card to pay your order, you can pay using your PayPal account or if you don't have one, you can pay as a PayPal guest.The payment is safer and easier.Just fill your credit card or debit card according to the page instructions and do not block any dialog…
As a rule, once the order has been made, the detailed information (the size, the color, the material, etc.) of the item is not allowed to change anymore.
You should sign in first with the correct email address and password that is the same you use when you made the order. Then click the button of "My Account"--“my order ”,you will see the order ID.