The length to purchase is best based on the length of the belt you currently use. Please ensure that the old belt you are measuring is not one that have not been used in years and that may be too short for you now.
Open-end: If the length is based on an open end belt (because you don’t have a close-end belt), measure the length (L) of your current leather belt strap from the tip of the buckle to the hole that you use most often, as shown in the diagrams. It does not matter if that hole is the hole in the center or not. The rationale is to measure the actual length that you wear.
Close-end: If the length is based on a close-end belt, measure the length (L) of your current leather belt from the pin to the most used hole. It does not matter if that hole is the hole in the center or not.
Our waist size is not an accurate length because most people wear their belts close to the hips, rather than directly on the waist.