Please see sketch -> this distance should correspond to your waist measurement as precisely as possible. You can find out your correct length very easy, there are 2 options: Either, you measure the waist size directly around the body, exactly where you like to wear the belt. Or, you just measure an old belt, incl. the buckle to the currently most used pin hole. This length in CM or INCHES is the right size (1 inch = 2,54cm). The measurement of trousers or other belt manufacturers may differ from our sizes, in particular compared with international declarations. Therefore we recommend to quickly review and measure the size. Please let us know in case of any question, we will be pleased to help.