The most widely used method is to buy a belt that is 1-2" larger than your pants size, or as some say: ONE SIZE UP. Example, if you wear a size 36 pants, you would order a size 38 belt. We do not make odd sizes (33, 35, 37, etc.) so you would have to go with a belt that is 2" larger. If you wear an odd size pants, say a size 37, and sticking with the 1-2" rule, you too should order a size 38. Again, we do not make odd sizes, and a size 40 would be 3" larger, or too big.
Measure a belt you currently wear. Measure from where the buckle attaches to the belt (leather wraps around the buckle) to the hole you are currently using. If this measurement is 42 inches, order a size 42 belt. Our belts are sized to the center hole. If you order a 42, it will be 42" to the third or center hole. Fitting a belt to the center hole is important as it gives you the most flexibility with your belt.
IMPORTANT: Do not measure the belt from end to end. You will not get the accurate size that way.