I purchased a Small originally online but it was far too big for me so I went into store and ended up going with an XXS. The size was perfect and I have already worn it heaps! Such a great staple piece to have when you don't know what to wear :) The quality is amazing and it keeps you very warm, so definitely recommend.
I wish these came in every colour of the rainbow. They are my favourite purchase ever, the length, the style, the fit, the comfort. Just utter perfection.