I would take them again but they are not perfect. A little big, especially on the sleeves. I usually wear a medium sized polo shirt for a proper GQ fit rather than the typical American men's "I wear a size too big" polo shirt. I'm 5ft 9in, lean weight, 170lbs. But the medium size in this shirt has sleeves below the elbows, so I looked like a kid in my dad's shirt. --It would be like a garbage bag. So I changed it to a small one that's a little thinner than I'd like. Looks good, ladies love it, but I've been criticized by male colleagues for looking too neat and skinny. I wear them in law enforcement with our patch sewn on at my local embroidery shop. If you're planning on wearing a vest underneath, you'll have to take your normal size and risk having sleeves that are too long. Also, there's something about the shoulder cut that makes you look like you've been to the gym and trained your trapezius muscles like an animal, which is a nice bonus.Conclusion: order one size smaller than you're used to. If it doesn't fit you, try another brand as you won't like the next size up.