I am 5ft 9 150lbs and I ordered a Small. This shirt fits amazing throughout the torso it’s very soft and comfortable. It looks cute untied or tied....unfortunately the long sleeves do not have much give if your arms are muscular. If I got a medium I would drown in how large the shirt would be since the small is oversized in a cute way. I just wish the sleeves were able to be stretched more because the length of the sleeves are perfect and if it didn’t take me 10 minutes minimum to make my arms fit I would wear the shirt all the time. 

I’m obsessed with this top!! I’m sorta in between a medium and large so I opted for the large and it fits perfectly! It’s held up after some intense workouts and plenty of washing and is super comfortable.