In order not to have any unpleasant surprises, we advise you to read the 4 steps of the guide and not necessarily to trust your usual size !
Place a sheet of paper on the floor against a wall. Put your foot flat on it , heel against the wall.
Ask a person (it's better ..) to draw a line in pencil, delimiting the front end of your foot.
Be careful to place the pencil as vertically as possible so that the lead does not go under the toe!
Measure the distance in centimeters using a ruler, between the edge of the sheet representing the rear limit of your foot and the pencil line representing the front limit of your foot.
It is possible that there is a difference from one foot to another. We advise you to take the highest value.
Refer to the following table to find out the size corresponding to the measurement you have made.
Then it's up to you to get as close as possible to the sizes available!
Please note, the sizes differ depending on the brand!