I figured out what the X means in XL, XXL, or XXXL. It is the number of times you wash it until it turns into a Large!That is, if you buy an XXL, then after 2 washes it will turn it into a large etc.Hope you find this information helpful.
Pros
Fits well, the color is Beautiful and its by POLO, can't ask for any more.
Cons
Shirt had three different sizes from what was ordered and it’s knock off