Measure a belt you have from the end of the belt buckle to the hole you use on that belt. That becomes the center hole measurement for your new belt as shown on the diagram below. Be sure to measure correctly as shown. All belts are custom made and cut to the length you order, they are not returnable for incorrect size. Be aware that your pants waist size is not your belt size. The belt is one layer higher than your pants and is usually about 2" longer than your pants size, so measure to assure satisfaction.
If your measurement needs to be 1/2" longer than on the menu, you can tell us that in the comments window on the check out page.