Use a flexible measuring tape
Measure your waist at the natural waistline
Measure your hips at the fullest part
Measure your inseam from crotch to ankle
Measure your rise from crotch to waistband
Measure your thigh around the fullest part
Measure your outseam from waistband to hem
Compare your measurements to the brand’s size chart
Check whether the pants use waist, inseam, or numeric sizing
Round measurements to the nearest whole inch or centimeter
Measure over fitted clothing or directly on skin
Keep the tape snug but not tight