I was so disappointed in this shoe.  I really wanted to love it and wanted it to fit.  I have two older pairs of this style and the nine fit me perfectly, no blisters ever, no tight spots, no slipping.  My husband surprised me with the new version for an early birthday gift and I was very excited, but the nine was too short, so I returned it for a 9.5.  The 9.5 was too long, but also far too tight on the instep and up towards the top of my foot.  I wore them around the house a little hoping I was just needing to get used to them, but within minutes both of my feet were tingling and had numb areas. I am not sure what happened between my beloved older model and this newer incarnation, but I will be trying a different brand of minimal shoe. So sad.