They are based in the far east and have no concept of US sizes. They are about two sizes too small. If you are a L, order XXL, etc. If you are XXL or above, don't bother. I ordered a XXL and it is large. I sent them an e-mail explaining the situation and they sent me this e-mail back:
Our largest size is XXXL. You want to change for the largest one? We are sorry for such kind of bother to you! Best regards!
Sincerely yours,
Susan
I responded I wanted to exchange and got this response:
If you want to send it back for a large one, you should pay for the shipping fee (including we resend to you). The shipping fee is expensive as a new jersey, So I suggest you that keep the jersey and order carefull about the size next time. Anything I can help, please contact me freely.
Susun.
Sounds like Susan is nicer than Susun. I will keep you up to date on the resolution.