IMPORTANT! The watch size chart is only an indication of the preferable size, considering the recent tendencies in fashion. If the chart suggests you wear 36-40mm watches, but you prefer slightly smaller or bigger instead, go ahead! In the end, it’s up to everyone to decide what they prefer to wear.
While the majority of people have oval-shaped wrists, some come a bit more round. Thus, individuals with rounder wrists should consider smaller sizes. The opposite logic applies to flat wrists – go for a bit larger so that the watch case could cover the recommended 70% of your wrist.