Use a fabric tape measure to find your measurements, then follow this guidelines.
Wrap the measuring tape around the fullest part of your bust, including your shoulder blades, the drop your arms to your sides to measure.
Measure around your natural waistline, keeping the tape comfortably loose.
Stand with your heels together and measure around the fullest part of your hips.
This is the measurement from your ankle to your groin, when you stand with your legs straight.