I have been wearing Birkenstocks for the last 34 years and I have ALWAYS worn the same size. These sandals are marked as the same size I wear but are far too small. They fit my daughter whose shoe size is 1.5 sizes smaller than mine. You cannot even attribute it to being a different style because I own the exact sandal in another color and they fit perfectly. It leads me to believe they may not be authentic Birks.

A great sandal, well made and extremely comfortable. No rubbing was caused on the first wear, they did feel hard on the sole at first but once I got used to them then I loved them. They are shaped to your foot and fit like a glove. Would definitely buy a second pair. I paid full price, missed the discounted price by a day! Only me

I've been fired at Birkenstock shop a few times before buying online. People keep saying size down etc but the footbed should have fingerwidth gap at front and back cos the footbed curls slightly on wearing, it's part of the corked moulding to your foot over a few weeks. You will then find with the T-bar ones particularly, that they are uncomfortable because the toe bar will dig in and push into the webbing between your toes. I am always a size 40 in normal shoes and size 40 in Birks.