1, select the size
Hold the ends of the waistband with both hands and put it around your neck. If the two ends are easily worn together behind the neck, you can wear this size. The ends of the pants may not need to be touched very accurately, but at least Wrap your neck.
2, measuring width
Make a fist, bend your elbows, and place your lower arm horizontally into the waistband of the zipper.
3, the length
Grab the trousers of the jeans with both hands and open them to the sides. If the trousers are just aligned with your chin, the length is suitable.
4, the amount of elastic
Want to know if the pants of this pair of jeans will be too tight? You can try to put your hand into the trousers with a fist. If it is too tight, it means that your legs are difficult to reach in. It will be very troublesome to wear.