The shirt has neither trade mark, nor laundry sign, it does not match european textile import regulation. It also indicates that the shirt is not official product, it was made in some kinds of black factory without goverment control. After laundry, the shirt turned greyish.
I am normally a US Size 4 and got the Medium. It fit wonderfully. My bust is 33in, Waist is 28 1/2in. It's a great work shirt. A nude colored bra completely disappears underneath it. My arm length is about 23 inches and sleeve it came up to my wrist.