As a long term wearer of the Elten boot range, I opted to do a remeasure of my feet for this purchase and went down a size for a snug fit. I have found personally this was a good move so far (and have combined with the SensiCare high arch supports for my feet), where previously over time the ankle support on the slightly larger size allowed too much roll within the boot as the leather relaxed. The comfort of the boot keeps me coming back, including most importantly to me, the give through the mid sole. Unfortunately my work (as a concrete repair and flooring contractor) trashes the boots quite quickly with usually the toe guard wearing through in the first instance as a lot of time is spent on the hands and knees. The body holds up well, the soles usually get gummed up with epoxy and other products again making them unsafe relative to my work - this would happen with any boot I wear. There is no wear in required for these boots and the comfort level, light weight, and build quality will impress you if you haven't tried them before. I haven't found anything that matches them in the marketplace so far. The price point might make you hesitate but I would say give some love to your feet, you only have one set!