I also am a diabetic and a nurse so I'm on my feet for long periods of time. I suggest that you get your feet measured by someone who does it on a daily basis. if you go to a redwing or florsheim shop they will measure your feet and try to fit you with the shoe you want and the understanding that you could return them if they don't work for you. lets face it you will need to wear them for a few hours to know if they will really work or not. if you do try them out be sure you walk on carpet to keep the soil off of the soles as much as possible. the other option is to go to a uniform shop and get a pair of nurses shoes. they do make them in mens styles and some of them resemble dress shoes.