I am between a M/L and ordered a M. It fit perfectly. I have more of an athletic build and bulkier arms, and this fit my arms perfectly as well. It's very soft, and even though it looks a little see-through in the photo, it really isn't in person. I would buy again and recommend to a friend. There's always next year Cubbies...It runs big. I could have gotten a size smaller, and I don't wear anything smaller than a Large...ever... The neck is pretty wide and I have to wear a tank under it.Super comfortable- nice and cool on shot summer day. I wore a cami underneath because the neckline is sort of low for my taste. Other women would probsbly have no problem- I'm pretty self conscious. I felt great wearing it!Bought this as a gift for my sister in law she loves it. Go Cubs.Just as I wanted! A little big but I wanted it baggyAll time favorite shirt...Love this shirt!