Bust: Measure around your chest, at the fullest point of the bust (not under the bust).

Waist: While standing up straight, bend at the waist to one side. The crease that forms is where your natural waist is located; measure there.

Hip: Standing with your feet together, measure around the fullest part of the hips. 

Hollow-to-Hem Measurement (Length) 

Your hollow-to-hem measurement is determined by measuring from the center of your collarbone (hollow) to the bottom (hem) of your dress. We highly recommend that you have a professional perform this measurement.

 It’s very important that you wear shoes with a similar heel height to those you will be wearing with your gown, and you will also need to take into consideration the fullness of your gown’s skirt. For example, if your gown is an A-line with a full skirt, you will need to move the measuring tape away from the body to ensure that your gown will be the correct length.

Most dresses come in a standard hollow-to-hem measurement, based on the size of the dress, which varies from designer to designer.