The sizes are, like most winter tops, a bit over, which makes it perfect to layer.
If you normally wear a XS or Small, choose a small.
If you normally wear a Medium, you can either choose a medium for a looser fit or a small for a better fit.
Large, choose large or medium for a tighter fit.
Please note that we are busy making these at the moment so they have a lead time of 4 days since order.
Pop us a email with any questions.