Pass a measuring tape across the fullest part of your chest in front, and over your shoulder blades at the back. Ensure that the tape is perfectly aligned horizontally and that your arms are positioned by your sides to get a correct measurement.
Place the tip of the measuring tape at your nape and pass it across the your shoulder and all the way down to your wrist.
Pass the tape around the smallest part of your abdomen, which will typically be right atop your belly button.
Stand straight with your feet together, and pass the tape around widest part of your hips making sure you get the fullest part of your buttocks. This will be about 8 inches down from your belly button.
Place the tape along the medial facing part of your leg, and measure vertically down from your crotch to your desired pant length.