First you will need a fabric tape measure and a full length mirror. If you don't have a fabric tape measure, you can use a piece of string or ribbon and line it up against a ruler or yardstick. For the best fit, wear little or no clothing while measuring. Take measurements in inches. To ensure a comfortable fit, pull tape measure snug, but not too tight.
With your arms relaxed at your sides, measure completely around the fullest part of your chest keeping the tape a bit loose.
Measure firm but not tight around your natural waistline. Find the natural crease of your waist by bending to one side.
Stand with your feet together and measure around the widest part of the hip line, at the top of your legs, which is usually about 7-9" below your natural waistline.
*How do I determine the right size?
A good fit is not only looking great but also feeling comfortable. Choose the measurement that matches your bust, waist and hip measurements and then choose the corresponding size to determine your dress size. If you fall between two sizes, choose the larger size.