For a large size of 15 (feet not swollen), length was accurate, but width was not wide enough for me. I was surprised because the price is so reasonable. Well, I thought I would take a chance - and they are perfect. In one post a Razer representative gave a BS answer about on-board memory being limited. I originally followed the size chart, but they were too big, so I sized down and they are perfect. I had started wearing Clarks, but thought Id go back to my Sketchers. I dont work in a call center so I cant speak to long term use but I will say that these are comfortable to wear for long periods. I then went looking for an easy solution. Google befragt, dabei jede Menge Artikel über Birkenstock-Fälschungen bei Amazon gefunden. The shoes are great, not a deep tread though.