If you have a pair of jeans that you love, you should use that pair to get the measurements.p Lay the pair of jeans flat on a surface. To get accurate measurements, smooth out the jeans flat on the surface. Wrinkles can throw your measurements off. Button and zip up your jeans before beginning.
Measure the waistband and double the number to get the waist measurement. Make sure the waist isn’t sagging at all. If your waistband is made from elastic material, don’t stretch it as you measure.
Check the inseam by measuring the length. The inseam is from the crotch seam down to the hem of the jeans.
Take the measurement from the crotch to the waist to get the rise. Some pant sizes may offer a “front rise” and “back rise” measurement. The front rise is from the crotch to the waistband in front, and the back rise is from the crotch to the waistband in back.
Measure the thighs 2 inches (5.1 cm) below the crotch seam to get the thigh thickness. Measure horizontally across the leg. Double this number to get your thigh measurement.
Compare the measurements to a size chart to find the right size.
Buy jeans slightly smaller if you think they will stretch. Most pairs of jeans are at their tightest the first time you wear them. With the stresses from repeated wearing, most jeans loosen up slightly over time, becoming more comfortable to wear. If a pair of jeans feels just just a bit too tight when you try them on, you may be able to get away with wearing them in the long run.
Consider having your pants tailored for a better fit. Find a nearby tailor who can make some adjustments, which often costs less than buying a bespoke pair of jeans.