These shoes were recommended to me by a several coworkers and friends of mine. We work in the Veterinary nursing field, which involves a lot of standing, kneeling, etc. I bought both the 39 and the 40 as I can go either way with different brands. The 39s fit perfectly around my foot, but my toes were smushed and hitting the front of the shoe. The 40s were so big that even with socks on they flopped like flip flops when I walked, which was a deal breaker for me, so I returned them.