*****HOW TO MEASURE*****
To measure your waist it is best to use a sewing measuring tape (flexible usually plastic) but if you don't have that available you can always use string or yarn and then measure that length against a regular metal contractors measuring tape.
Waist- always measure at your true waist the smallest part of your torso just above your belly button.
Bust- Bra Size is usually best - keep in mind that if you are ordering a waist length bustier the waist will always be smaller than the bust measurement.
Length- starting from your true waist measure down to where you would like the hem (bottom) of the dress or skirt to fall.
Remember when you are ordering a floor length garment to wear the shoes you will be wearing with your ensemble when you are measuring.