1. Measure your waist and hips with the tape measure being slightly loose. Chances are that the jeans manufacturer will usually have a “waist” measurement slightly bigger than your waist. For example, if you have a 24-inch waist, the jeans manufacturer will have the jeans run at a 25-inch or 26-inch waist. Of course, some brands run larger or smaller than others.
2. To get your inseam measurement, take a current pair of pants which you like the fit. Then measure the inseam from the crotch area down to the end of the pants leg.Keep these measurements (waist, hips, and inseam) handy so that you can refer to any sizing charts provided by the manufacturer.