STC feels it is very important for people to take a few minutes to properly fit the shoes that you will spend 8 + hours a day in. When you go to the store and buy casual shoes, athletic shoes or possibly dress shoes it would be a normal thing to try on 2-3 pairs before you get the one that fits you best. Hence it only makes sense to do the same with your boots. We recommend trying on one in the size you measure on a proper footwear measuring device like a Brannock device and then trying the ½ size up or down or either way on width to really get the best fit possible. A couple of things to consider are that if the boots are not comfortable when you try them on you should not count on them becoming more comfortable with wear in order to make them bearable. You also should be looking for a fit that does not have your heel lifting up and down whilst walking. If your heel is lifting the footwear will prematurely wear out and also cause you discomfort . It is better to try your boots on later in the day as your feet tend to swell over the course of the day. This will help you select footwear that is not too snug. Try your boots on wearing the socks you would wear whilst working and lastly a good wool sock or wool polypropylene blend will give you a lot more all day comfort then a cotton sock.