A 
 Bust. Measure under your arms,
 across the fullest part of your bust,
 don't pull the measuring tape too tightly. 
 B 
 Waist. Measure your natural waistline (above your belly button & below your rib cage). Find by bending slightly to the side. 
 C 
  Hips. Measure snuggly around the fullest part of your bottom. Remember to place your feet together before measuring.