I'm 5 foot 7, 115 pounds and I think that...
I'm 5 foot 7, 115 pounds and I think that a medium would fit me and I like it to be a little loose, what do you think?
I'm 5'7 like you, 140 lbs, and i'm still growing. I haven't hit my growthspurt yet so I got the large, hoping that over this summer i will grow a few inches.
For you i think either a small or medium. Depending on how long your arms are i would go with the small,as long as you stopped growing*. And its also based on personal preference , if you think it fits then it fits. Hope this helps!!