Naha chick 4 I ordered an X-small size, which fits me well.(My shoe size is a 22.5cm Japanese size / 35-36 French size.)I ordered insoles for flat feet for the first time on advice of a physiotherapist, so I wasn't really sure of how to choose them. I bought these ones and a half-sized one.So far, I think the whole foot size type like this one is more comfortable: they don't move inside of the shoes when you walk or put our shoes on/off.I didn't need to cut these to adjust them to my shoes so I cannot review how easy to cut they are.However, after trying them on for a very short walk, I can feel these insoles support my feet into the right position well, without putting me in any discomfort. I knew my feet and legs were not in the right position but I didn't know how much until I stood up on these... a little shocking. I wish I had bought some years ago.I will use with them for a month or so and update the review then.