step by step measuring guide    
  #5 shoulder to dress hem over bum
Start on the middle of the top of your shoulder and let the tape fall down your back pressing lightly on your body at the waist, over your bum to the desired length of the gown it is important to decide at this point how long a train you would like on your gown. If you choose to have your gown hang longer than in the front, make sure to measure the desired length at this at this point.