Hello!

When We checked your order, you bought a jacket of size S that you were supposed to exchange.
Then, we will deliver this product right away.
And if you send us the M-size jacket, we'll take care of it as a return.
When you send it to us, you only need to pay the delivery fee in advance and don't need to give us a receipt.
When the product arrives, we will refund the M-size jacket.
This is a way to receive delivery much faster.
That's a good choice. :)

Then, if you have any more questions, please feel free to contact us.
Thank you.