To determine your clothing size, compare your measurements (in inches) to these size charts.
Measure under your arms around the fullest part of your bust/chest, keeping the tape parallel to the floor.
Measure around your natural waistline. Keep the tape comfortably loose.
Stand with your heels together and measure around the fullest part of your hips. (Approximately 8" from your waist if you're average height, and 7" if you're petite.)
Measure from the crotch to the cuff on the inside of the leg. The number of inches, to the nearest ½", is the inseam length.
It is best to have someone take the measurements for you, measuring over undergarments only.