Bought two other similar shirts (albeit one was short sleeved) from brick and mortar retailers the SAME SIZE. There is no size chart in the product description for these shirts, just the words "fits as expected". I 'expected it to be at least close to the other vented fishing shirts I bought. It was not. It wasn't tight but it wasn't a good fit either. I decided to return this shirt because it did not "fit as expected", and return to the brick and mortar retailer.