I bought the Large size. I am 1.83 meters tall and weigh 85 kilograms.
The sleeves are wide, so much so that my legs could fit through them, not just my arms. They are also long, if I don't button them up, they cover my fingers.
It is long and wide around the waist, so much so that it can't be worn "outside" because it would look like a dress...
It has a style from a previous decade...
For sure, with the 100 euros that I found it for in size Large, I could have gotten 2 much better fitting shirts.

If you wear a Ralph Lauren shirt, the objective truth is that you will not try another brand again, (maybe another one from G starts). Very good fit, tremendous comfort even on very hot days, it matches almost everything, but it will take you a year or so to acquire 2-3 so that you are covered.

Incredible application and the color is perfect, one of the best blues you can use. It matches perfectly with beige and brown.