The sizes are all over the place!
I got them for my husband 2 sizes bigger. The size is different for each color.
The gray one fits OK, not the most comfortable.
The blue and black ones are very tight.

I gave it 3 stars because I ordered black and half of them are dark blue...
Also, even though I read that they have a tight fit, I ordered 2XL to be okay while I usually wear XL and I realized that the size is not as expected...
Disappointed with the size...

While I usually wear medium/large, I bought the large size to make sure it would fit me, and it turned out to be very small. I would describe it as small. Unfortunately, they are not returnable, so they are useless to me.