My sister who is a medical technologist has been wearing New Balance and K.Swiss as working shoes for years.  When she gave Sanita a try, she could not get use to them.  So she gave me her two pairs of Sanita Prof clogs. I don't believe the shoes are true to size. I wear a size 10, she 11.  The shoes are EU size 42; fits me perfectly.  I tried on EU size 40, the equivalent to size 10, and they were tight. She does not want to give Dansko or Sanita another try.

After wearing the Sanita three days in a row, I caught cramps in my feet (awful feeling) on the fourth day when I wore another pair of shoes. The Sanita keep your feet stable and stationary.  Yet, they are very comfortable to me.  To avoid the cramps, I do heel-toe exercises after I wear them or whenever I get a chance to sit and take my shoes off.  I plan to buy three pairs in other colors.