This is mostly copy and pasted from a review I did on another one of their shirts. But it all applies to this one as well.

I am 6'2", 150lbs and I ordered a US medium. I think it's on par with what other shirts here that are medium. About the same size as my medium Mark Anthony Shirt. It fits perfectly.

This is a Size chart from their website. Note you should give a bit of room for error of measurements. But I would say their sizes are fairly accurate based on wearing them now, and comparing to sizes of other shirts I bought.

Sorry for the bad formatting, not sure of a better way to do this on amazon.

---------------Shoulder--------Chest-----------Sleeve-------Length
M(US S)-----40.5cm/15.9in---47cm/18.5in-----60cm/23.8in--67cm/26.4in
L(US M)------42cm/16.5in----49cm/19.3in-----62cm/24.4in--69cm/27.2in
XL(US L)----43.5cm/17.1in---51cm/20.1in-----64cm/25.2in--71cm/28.0in
XXL(US XL)---45cm/17.7in----53cm/20.9in-----66cm/26.0in--73cm/28.7in

Also these sizes are very close to the sizes of many of their other shirts.

The material is very soft and feels a lot better than other dress shirts I buy here in the US. If you are slim guy who has a hard time finding nice looking and fitting clothing, I definitely recommend this shirt or others. These shirts are also not the kind you would have tucked in. Since they are kind of short(look at the picture) moving around at all will just untuck the shirt. The shirt is meant to be stylish and untucked anyway.

One reminder I am sure you will see with other reviews. You must be a slim guy to wear this. The more muscle or fat you have the bigger size you should get. Measure yourself and compare to the chart, hopefully someone can find it useful. If you are not sure how to measure, just search how to measure mens shirts. You can just take a tape measure and measure in the appropriate places.