In order to choose your coat size as precisely as possible, we advise you to consider the use you will make of it: will you wear this coat alone or over a jacket? Are you going to fill the pockets or do you usually prefer to carry a bag?
Depending on your daily use, the size to choose may indeed differ.
In any case, to determine the size to order, take the measurement of your chest width on a coat that fits you perfectly for the chosen use. Using a metric tape, measure it as shown below, then refer to the size guide appearing on the sheet of the desired product.