Betula (Birkenstock) sandals size 36

Betula is a Birkenstock line. I actually purchased these at a Birkenstock outlet when I lived in Mainz in the early 2000s! I’m a true 37, so these have always rubbed my heels a bit too much. But I couldn’t resist them so purchased the 36 since they felt like they fit just fine at the store! As a result, they are in virtually new condition having only been worn a few times over all these years. Tried them again just a couple of weeks ago and disappointingly, my feet have still not shrunk. So, I’ve made the painful decision to finally sell. They do not have a cork footbed so there is zero decay. Beautiful iridescent blue upper. Amazing vintage pair of sandals!