Using a measuring tape, measure over the undergarments you'll be wearing with the style you're ordering. If you don't have a measuring tape on hand, simply use a piece of ribbon or string and line it up against a yardstick.
Measure around chest at fullest point of the bust and under your arms.
With forearm parallel to chest, measure from back center of neck around the elbow to the wrist bone.
Measure around your waist at the narrowest point.
Stand with your heels together and measure around the fullest part of your hips.
Measure a similar style of well-fitting pants from the crotch/rise seam along inside the leg to the hem.
Please observe that these size charts are only guides to helping you find the right women’s sizes. Sizes may differ notably between different clothing manufacturers and brands.