I have been wearing Birks for over 20 years and I just love them.  I know that as a size 6 I wear a 36 in their Euro sizes but they have always been that way.  This London clog is my first fully enclosed birk and I am very happy with them.  The hunter brown color could be black or brown depending on the light and that works for me.  Wonderful shoes can't go wrong with Birkenstock.