I'm 5'6, 180 lbs and normally wear a medium sized polo shirt but bought a size L which is just right. These are very good quality shirts for the price with bright colors, the buttons are very thick and strong and they even used the correct yellow thread to sew the buttons on. I always button my collar up and dry my polo shirts on a hanger to prevent shrinking and fading, so I can't comment on that. can shrink. I have now ordered two more shirts, black/orange and black/white. Recommend !POIB !