These are a cute little number to wear spring through early fall.  Because I will use talc and go sockless, I ordered down in size (as they run fairly true to the other Danskos).  If you are a "true" size in Danskos (if a 38 fits perfectly and you wear thin socks), I would order the same size in this model.  I find that a 38 Dansko Professional is a tad loose on me but a 37 is too short to allow the back to move loosely as it should in a clog.  I am forced to wear a thicker stocking for fit and go with the 38.  Sockless, the 37 is a fit, for me.  These are the first Danskos I have ordered to allow for summer wear and I'm delighted with them!