When taking measurements, you can use a tape measure or string. If you’re using a tape measure, wrap it around the area you’re measuring until the ends meet. If you’re using a string, cut it where the ends meet and use a ruler to measure the length.
Waist: Measure horizontally around the narrowest part of your waist.
Hips: Measure horizontally around the widest part of your hips.
Inseam: Measure vertically from the crotch to the seam.
Inside Leg Length: Measure vertically from the top of your inner leg to the bottom.
If one of your measurements is between two sizes, order a smaller size for a snug fit or a larger size for a loose fit.
If your body measurements for hips and waist correspond to two different sizes, go with the one indicated by your hip measurement
Nike's Plus Size products are different than "extended" sizing, they are meticulously proportioned to the needs of the body (Size 1X to 3X).