Belt By Ardente, Regular & Big Men's Sizes, Gunmetal Buckle - Style 3601 Gunmetal buckle (for silver tone buckle see style 3636) 35mm. Wide (app.1 inches) Strong and durable with stitched edges. To find your belt size: Measure around your waist, over your pants and shirt. If the measurement is, for example 38, order a 38 belt. If the waist measurement is an odd number, say 37, round up to the nearest even number and also order a size 38.