I am 5ft,115lbs size SM fits perfect! I was expecting like a t-shirt fabric for some reason but that is not at all what this is made of! It is SO soft. It is very stretchy, lightweight and very breathable. The care instructions say to hang dry, I put mine in the dryer (out of habit) it did not shrink or cause damage. I AM NOT RECOMMENDING NOR SAYING DRYER USE IS OK, I am only stating that 1 tumble in the dryer did not cause any damage but I WILL be hanging to dry from here on. This is my new favorite thing to wear :D