JIIJ Size Guide
Fitting suggestion: sizes 35-39EU fit large and it is suggested to take a size down from your usual size. Sizes 40-46EU are wider but they normally fit true to size unless you have very slim feet. For example, if you are a 39EU, take a 38EU. If you have slim feet and a size 44EU, it is best to take a size down too as the size 44EU can be too wide for you. But if your feet are wide, take your usual 44EU. Lastly, you are not supposed to touch the front of the shoe with your toes.