I am size 5 and the 36 was a little long, about 1/2&#34; longer.  It's probably the same as US 5.5.  I like them but the straps never stay on.  I even punched an extra hole but they still don't stay on.  Another thing I didn't like about them is the footbed made out of straw instead of leather or other material that can be wipe clean.  Since they're made of straw, all the dirt and sweat stay on the footbed and they can't be cleaned, which looks disgusting.  Otherwise, I like them.  They look cute and just  the right height.