A (left) is the original at 7 1/4″.
Jeans leg measurement. Waist measure around natural waistline 2. Measure across the hip area, this is in most cases 1 1/2 inches below the zipper. The typical way to define sizes for jeans are the following:
B (right) is 7 3/4″. Most pants have two main seams. Inside leg measure from top of inside leg at crotch to ankle bone asos.
Measure around the fullest part of your hips. Measuring this too high or too low will result in a large difference, especially in skinny jeans. This measurement will tell you how long the legwear is.
Measure the width of the leg edge to edge at the level of the center of the knee. Lift the top jean leg towards your waist and place them there. Pant leg opening measurements may change 1/8″ for each size up or down.
In such a case, the right jeans for you would be xs in sml size, 2 in us. Measure around the smallest part of your waist. Measure 13 inches down from the inside of the crotch on one side.
To choose the correct size for you, measure your body as follows: Be careful in placing the top pant as not to twist the crotch. Make sure to keep the tape measure as horizontal as you can.