I have 4 pair of MBT's; only shoe my feet don't hurt wearing.  I tried the Kianga in 39--too small and painful.  I tried 40--I could put my thumb behind my heel.  What happened to the sizing?  I have two pair of other MBT's sized 39 2/3 which equates to 9 US. I can't order online because of the sizing variables but live so far from a city that it is a challenge to get some desparately needed new ones.  I would love to be able to get consistant sizing and I could order lots of them!