I have two other pair of Vionic/Orthaheel sandals and the Alanis sandal fits differently than those.  The foot bed on this sandal is more narrow and a bit shorter than that of my Vionic Tide II sandal of the same size.  I wish there was more consistency with the footbeds of their sandals because I love my other two pair and have had them for years.  Sadly, these are going back!