I wear an L-XL in most shirts. Going by the sizing chart you need to order an XXXL to get an XL.

So I ordered an XXXL which I have never worn in my life.
But, The shirt I got was barely a mens medium (I compared it with other shirts I own).

Worst of all is that shipping cost as much as the shirt!!!
And communication is a nightmare.

The response from the seller was something along the lines of:

"sorry, please return as cheaply as you can".